Question

find the value of a proporation 2/5 : a :: 3/7 : 4/9​

Answer 1

Answer:

so the answer is 3a= 56/45

Step-by-step explanation:

let a be the fourth number

means=extremes

2/5*4/9=a*3/7

3a/7=8/45

3a= 8/45*7

3a= 56/45

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