# ProportionsOf ?

> Rule of Three Solver

Canonical page: [https://chrome-stats.com/d/id1151235927](https://chrome-stats.com/d/id1151235927)

## Overview

- **ID:** `id1151235927`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Claudio Guirunas
- **Category:** Developer Tools
- **Version:** 1.4
- **Last updated:** 2026-08-25
- **First published:** 2016-09-16
- **Size:** 11 MB
- **Data as of:** 2026-09-21
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/proportionsof/id1151235927)
- **Website:** [https://proportionsof.398031.xyz/?g=download&l=en](https://proportionsof.398031.xyz/?g=download&l=en)
- **Privacy policy:** [https://proportionsof.398031.xyz/?g=privacypolicy&l=en](https://proportionsof.398031.xyz/?g=privacypolicy&l=en)

## Description

Cross-multiplication or Means-Extremes Property of Proportions:

In maths we say: The product of the means is equal to the product of the extremes:
∴ x:z = y:w => x.w = z.y

This APP uses the Rule of Three to calculates the ratio between values.

For example, you can calculate whether it's worth buying a promotional product like this one:

"Buy 70gr of biscuit for €4.98 or 140gr for € 9.97".

Would not it be more advantageous to buy 2 of 70g instead of 1 package of 140g?
Well, you can draw your own conclusions using the app for a multitude of calculations.

Basically, the entire world around your is a matters of proportions.

The App also a great tool for children to get a notion of how they can  calculate proportions using the rule of three to start to use on their daily-life.

Available in Arabic, Bengali, Chinese, Dutch, English, French, German, Greek, Hebrew, Hindi, Irish, Italian, Japanese, Korean, Malay, Persian, Portuguese, Russian, Spanish, Turkish and Ukrainian.

∙ Terms & Conditions of Use: https://proportionsof.398031.xyz/legal.php?doc=term_and_conditions&l=en
∙ Privacy Policy: https://proportionsof.398031.xyz/legal.php?doc=privacypolicy&l=en
∙ Disclaimer: https://proportionsof.398031.xyz/legal.php?doc=disclaimer&l=en

For more information, please visit the website: https://proportionsof.398031.xyz/?l=en

## Rankings

- #2,250,569 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1151235927)