Gonzaleskerrviz
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Three numbers are in the rationof 2 : 3 : 7. What is the largest number if the sum is 312?

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Shinalcantaraviz
let 'x' be the common multiplier
so you'll have it as:
2x:3x:7x
2x + 3x + 7x = 312
12x = 312
x = 26
2x = 2(26)
     = 52
3x = 3(26)
     = 78
7x = 7(26)
     = 182
therefore the largest number is 182

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