Question

the fourth proportional to 0.4,2 and 10 is
a.50
b.12.5
c.2
d.15​

Answer 1

Answer:

option d)15

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Answer 2

Given  : 0. 4 , 2 and 10  

To Find :  fourth proportional

a.50

b.12.5

c.2

d.15​

Solution:

a : b : c : d  in continued proportion

=> b/a  = c/b  = d/c

Let say fourth proportional to 0. 4 , 2 and 10   is  x

=> 0.4  : 2  : 10 : x

=> 2/0.4  = 10/2  = x/10

=> 5 = 5  = x/10

=> x = 50

Hence  fourth proportional to 0. 4 , 2 and 10   is 50

Correct option is option a) 50

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