Question

find the third proportion to 1km 500m and 300m

Answer 1

Answer:

1 km 500 m = 1000 m + 500 m = 1500 m

1500 m : 300 m :: 300 m : ?

Let the unknown value be x

⇒ 1500 / 300 = 300 / x

⇒ 5 = 300 / x

⇒ x = 300 / 5

⇒ x = 60

Hence the third proportion is 60.

Answer 2

a =1 km 500m = 1500 m

b = 300m

We know that third proportion = b²/a

                                                = (300 x 300)/1500 = 90000/1500 = 60