# proportion

> English word · Noun · IPA /pɹəˈpɔɹʃən/ · frequency rank #6,002

## Definitions
1. A quantity of something that is part of the whole amount or number.
2. Harmonious relation of parts to each other or to the whole.
3. Proper or equal share.
4. The relation of one part to another or to the whole with respect to magnitude, quantity, or degree.
5. A statement of equality between two ratios.
6. The "rule of three", in which three terms are given to find a fourth.
7. Size.

## Etymology
From Middle English proporcion, from Old French proportion, from Latin prōportiō (“comparative relation, proportion, symmetry, analogy”), from pro (“for, before”) + portio (“share, part”); see portion.

## Easily confused with
- **proposition** (https://plainspell.com/en/vs/proportion-vs-proposition)
- **proportions** (https://plainspell.com/en/vs/proportion-vs-proportions)
- **proportional** (https://plainspell.com/en/vs/proportion-vs-proportional)
- **proportioned** (https://plainspell.com/en/vs/proportion-vs-proportioned)
- **promotion** (https://plainspell.com/en/vs/promotion-vs-proportion)

## Common misspellings (16)
`porportion`, `pproportion`, `prooprtion`, `proporiton`, `proporrtion`, `proporsion`, `proportino`, `proportionn`, `proportoin`, `proporttion`, `propotrion`, `propportion`, `proprotion`, `prpoortion`, `prroportion`, `rpoportion`

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/proportion