Question

Find Third Proportion:15,45​

Answer 1

Answer:

c

Step-by-step explanation:

If a:b = b:c , then b^2 = ac.

Here “a” is first proportion

“b” is mean proportion

“c” is third proportion.

=> c = b^2/a

= 45^2/15 = 135

Answer 2

Answer:

let the third portion be x

ATQ =

15 : 45 :: 45 : x

product of means = product of extremes

45×45 = 15×x

2025/15 = x

x = 135

so, the third portion is 135