Answer
The equality between the two ratios is known as the proportion.
Work Step by Step
The equality between the two ratios is known as the proportion.
If $a:b\text{ and }c:d$are two ratios, then it will be proportion if $a:b=c:d$.
Proportionality between two ratios are determined by symbol$::$, that is if \[a:b\text{ and }c:d\]are proportional then it can be written as, $a:b::c:d$.
Example: consider a numerical example:
Two ratios $\frac{4}{9}$ and $\frac{12}{27}$ are taken then
The proportionality between the two ratios is$\frac{4}{9}=\frac{12}{27}$.
