Question

did 225 in a proprotion?
7. The first, third and fourth terms of a proportion are 6, 10 and 25 respectively. Find its second term.
8. Are the numbers 25. 45 and 81 in continued proportion?
9. Find the mean pr​

Answer 1

Step-by-step explanation:

7) let 2nd pr be x

so, 6:x :: 10:25

or,. 6/x = 10/25

or,. x= 6 x (25/10)

x=15. (Ans)

8) Let 1st term be a

2nd term be b

3rd term be c

To be in continued proportion,

b^2 = ac (law)

LHS

b^2

=45x45

=2025

RHS

a x c

= 25 x 81

=2025

Since , LHS=RHS

Hence,they are in continued proportion.

9) Cannot help sorry!

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