definitions
• synonyms

# proportional

[pruh-pawr-shuh-nl, -pohr-]
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1. having due proportion; corresponding.
2. being in or characterized by proportion.
3. of, relating to, or based on proportion; relative.
4. Mathematics.
1. (of two quantities) having the same or a constant ratio or relation: The quantities y and x are proportional if y/x = k, where k is the constant of proportionality.
2. (of a first quantity with respect to a second quantity) a constant multiple of: The quantity y is proportional to x if y = kx, where k is the constant of proportionality.

## Origin of .css-1fxfie5{font-size:22px;}@media (max-width:768px){.css-1fxfie5{font-size:18px;margin:0 10px 10px 0;word-break:break-all;word-wrap:break-word;-webkit-hyphens:auto;-moz-hyphens:auto;-ms-hyphens:auto;hyphens:auto;line-height:22px;}}proportional

1350–1400; Middle English proporcional < Latin prōportiōnālis. See proportion, -al1
Can be confusedproportional proportionate

## Synonyms

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1. harmonious, comparative, accordant, consonant, proportionate.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## Examples from the Web for proportionality

### Historical Examples

British Dictionary definitions for proportionality

# proportional

1. of, involving, or being in proportion
2. maths having or related by a constant ratio
noun
1. maths an unknown term in a proportionin a/b = c/x, x is the fourth proportional
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

## Word Origin and History forproportionality

### n.

1560s, from French proportionalité (14c.) or directly from Medieval Latin proportionalitas, from proportio (see proportion).