Question

find the fourth proportional to 2.4, 4.6, and 7.6 ?

Answer 1

The forth proportion is 3.96 i guess......

Answer 2

3.96 is the fourth proportion to 2.4, 4.6, 7.6

Given:

2.4, 4.6, 7.6

To find:

Fourth proportion = ?

Solution:

According to ratio and proportion, by formula.

a : b :: c : d ….(1)

here a = 2.4, b = 4.6, c = 7.6

substitute the values in eq(1)

2.4: 4.6:: 7.6 : d

Therefore, $2.4\times 7.6 = 4.6\times d$

18.24 = 4.6× d  

$d= \frac{18.24}{4}$

d = 3.96

The fourth proportion is 3.96