A proportion is a mathematical equation that states that two ratios are equal. In other words, it compares two fractions or two parts of a whole that are equivalent to each other. Proportions can be represented in the form \( \frac{a}{b} = \frac{c}{d} \), where \( a \), \( b \), \( c \), and \( d \) are numbers or expressions.
For example, let's consider the proportion:
\[ \frac{3}{4} = \frac{6}{8} \]
In this case, the ratio of 3 to 4 is equal to the ratio of 6 to 8. Each side of the equation can be simplified to a similar relationship, reinforcing that the two ratios are indeed equivalent. This proportional relationship can be useful in various applications, such as scaling recipes or solving problems in geometry.