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Papessa [141]
3 years ago
6

%20%3Ab%20c%3A%20" id="TexFormula1" title="if a : b = 2 : 3 and b : c = 4 : 5 than find a :b c: " alt="if a : b = 2 : 3 and b : c = 4 : 5 than find a :b c: " align="absmiddle" class="latex-formula">
​
Mathematics
1 answer:
grigory [225]3 years ago
8 0

Answer:

<em>a:b:c=8:12:15</em>

Step-by-step explanation:

<u>Combined Ratio</u>

We are given the ratios:

a:b=2:3

b:c=4:5

The combined ratio a:b:c will include all three variables in one single expression.

Before finding it, we must have a common number for the common variable (b). Since b is 3 in the first ratio and 4 in the second ratio, we must equate both by finding the LCM of 3 and 4=12, thus both ratios will be amplified as follows:

a:b=2:3=(2*4):(3*4)=8:12

b:c=4:5=(4*3):(5*3)=12:15

Now there is a common factor in both ratios, we can combine them removing the common factor:

a:b:c=8:12:15

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