Proportion
Part of Math Symbols
Proportion has no standard Windows Alt code. Copy the character directly, or use its HTML entity or Unicode value instead.
- Alt code
- None
- HTML entity
- ∷
- Unicode
- U+2237
About this symbol
∷, four dots, is the old sign for proportion, read “as”: a : b ∷ c : d means a is to b as c is to d. William Oughtred used it in the seventeenth century, and it survives in school exercises on ratios.
Unicode facts
- Official name
- PROPORTION
- Type
- Maths symbol
- Unicode block
- Mathematical Operators
- Unicode group
- Relations
- Added in
- Unicode 1.1 (1993)
Click the symbol or any value at the top of the page to copy it. See the full Math Symbols chart for related characters.