Question

Which pair of ratios can form a true proportion?

1/2, 6/10
6/8, 5/20
3/5, 6/10
3/9, 7/80

Answer 1

3/5 and 6/10 are a true proportion.  Just simplify the fractions and see which ones have been factored down enough to be the same. 

Answer 2

A true proportion is an equation that states that two ratios are equal.

1) The given ratios in their lowest form are:

`(1)/(2) and (6)/(10) =(3)/(5)`

The two ratios are not equal.

2) The given ratios in their lowest form are :

`(6)/(8) =(3)/(4) and (5)/(20) =(1)/(4)`

The two ratios are not equal.

3) The given ratios in their lowest form are :

`(3)/(5) and (6)/(10) =(3)/(5)`

The two ratios are equal and hence it is True proportion

4) The given ratios in their lowest form are :

`(3)/(9) =(1)/(3) and (7)/(80)`

The two ratios are not the same .

The third option the ratios
`(3)/(5) and (6)/(10)` are in true proportion.