Question

A student was asked to calculate the third proportion of 5 and 10. He mistook it to be 10 and 5. What is the percentage error in the calculation?

Answer 1

Step-by-step explanation:

The third proportion of two numbers aand c is denoted to be that number 'b'such that

a : c = c : b

Here,

Let a = 5 , c = 10,

Third proportion of 5 and 10 be 'b'

=> 5 : 10 = 10 : b

=> 5 × b = 10 × 10

/* Product of extremes = product ofmeans */

=> b = 100/5

=> b = 20

Answer 2

Answer:

Ånßwer ìs

20

Step-by-step explanation:

The third proportion of two numbers aand c is denoted to be that number 'b'such that

a : c = c : b

Here,

Let a = 5 , c = 10,

Third proportion of 5 and 10 be 'b'

=> 5 : 10 = 10 : b

=> 5 × b = 10 × 10

/* Product of extremes = product ofmeans */

=> b = 100/5

=> b = 20