a比b多3分之b,b:c=2:5,则a:b:c=?

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a比b多3分之b,b:c=2:5,则a:b:c=?
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a比b多3分之b,b:c=2:5,则a:b:c=?
a比b多3分之b,b:c=2:5,则a:b:c=?

a比b多3分之b,b:c=2:5,则a:b:c=?
a比b多3分之b,
a-b=b/3
所以a=4b/3
b:c=2:5
所以c=5b/2
故a:b:c=(4b/3):b:(5b/2)=8:6:15

a比b多3分之b, a=4b/3
b:c=2:5, c=5b/2
a:b:c=(4b/3):b:(5b/2)=8:6:15