Question

The first,second and third term of a proportion are 30,40 and 60. Find the third proportional.​

Answer 1

answer

80

step-by-step-example

Let,thefourth term be x

1. the product of extremes=30×x
2. the product of means=40×60
3. Now,given that the term are in proportion.
4. (30×x)=(40×60)
5. x=40×60/30=80.
6. Hance,the fourth term of a propotion is 80.

Answer 2

There's a little mistake in your question

ANSWER :-

Let the third term be = a

= 30:40::a:60

Product of extreme terms = Product of mean terms

= 1800 = 40*a

= 1800 = 40a

a = 1800/40

Cross 1 zero from both the values , that gives = 180/4

                                                                               = 90/2

                                                                               = 45/1

a ( 3rd term) = 45

HOPE IT HELPS