Samsung Galaxy / Tools / PROPORTIONS EASY
REVIEW
Proportions Easy solves one math problem and shows its work.
Pentawire's tiny Galaxy Store utility cracks the four-term proportion — including continuous ones — and walks you through the steps. It's a homework helper with no ambition to be anything else.
BY THE APP COMRADE DESK · MAY 10, 2026 · 3 MIN READ
Proportions Easy
PENTA WIRE
OUR SCORE
6.4
SAMSUNG GALAXY
★ 5.0
PRICE
Free
Most calculator apps try to be everything. Proportions Easy does the opposite: it solves the four-term proportion and that’s the entire surface area. You enter three values, tick the unknown, and the answer comes back with the cross-multiplication shown underneath.
The pitch makes sense once you remember who actually needs this. Proportions are a middle-school staple — scaling recipes, converting units, working through ratios — and the standard phone calculator is a clumsy way to handle them. A purpose-built tool that also handles continuous proportions, where two unknowns sit symmetrically across the colon, is genuinely useful for the homework hour.
What separates this from a one-line web form is the step-by-step view. The app doesn’t just hand back a number; it shows the work, which is the part a student is supposed to be learning. That’s a small editorial decision that quietly turns the app from a cheating aid into a study aid.
It does one thing, shows the steps, and gets out of the way — which is more than most calculator apps manage.
FEATURES
The app presents four labelled fields — A, B, C, D — each with a checkbox. Tick the unknown, fill the other three, tap Calculate, and the missing term appears. Continuous proportions get their own path: tick the two extremes (A and D) or the two means (B and C) and the app solves both unknowns from the remaining pair.
A Reset button clears everything to the initial state. The other thing worth flagging is that the app shows the working — the cross-multiplication and division that lead to the answer — rather than just dropping a number on the screen. For a student trying to learn the mechanic, that's the whole point.
MISSION ACCOMPLISHED
Single-purpose math utilities live or die on whether they save you time over opening a calculator and doing the arithmetic yourself. Proportions Easy clears that bar by handling the continuous case directly — you don't have to remember that the missing means are the square root of the product of the extremes, the app does it. The step-by-step view turns it from a black-box answer machine into something a teacher could plausibly recommend.
ROOM TO IMPROVE
The interface is plain to the point of being dated, and there's no history, no copy-to-clipboard, no fraction or decimal mode toggle that we could find. Anyone past the homework stage will outgrow it in an afternoon. The Galaxy Store listing is also thin on screenshots and recent release notes, which makes it hard to tell when — or whether — the app is still actively maintained.
CONCLUSION
Install this if you have a kid working through ratios and proportions and you want a focused tool instead of a general calculator. Anyone else can skip it without missing much. Worth watching whether Pentawire ever expands the same step-by-step approach to other corners of pre-algebra.