1. Find Third proportional of `16,36`
Solution:
If `x` is the third proportional to `a,b` then `a:b :: b:x`.
Let the third proportional to the numbers `16,36` be `x`.
Then, `16:36=36:x`
`:. 16/36=36/x`
`:. x = (36 xx 36)/(16)`
`:. x = 81`
2. Find Third proportional of `4,6`
Solution:
If `x` is the third proportional to `a,b` then `a:b :: b:x`.
Let the third proportional to the numbers `4,6` be `x`.
Then, `4:6=6:x`
`:. 4/6=6/x`
`:. x = (6 xx 6)/(4)`
`:. x = 9`
This material is intended as a summary. Use your textbook for detail explanation.
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