An equation stating that two ratios are equal is called a proportion.

Method 1:

Ratio of the first fraction

Ratio of the second fraction

Check the ratios of fractions.

The ratios are equal. So, the ratios form a proportion.

Method 2:

Write the equation

According to Means-extremes Property of proportion: If ,

then ad = bc.

                        (Cross products)

                            (Multiply: )

The cross products are equal. So, the ratios form a proportion.

Yes, the ratios form a proportion.