Finding the Fourth Proportional to 721,756,670.66, 995,910,435.96 and 420,391,580.09
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Solution
The fourth proportional to 721,756,670.66, 995,910,435.96 and 420,391,580.09 is: 580,074,114.75
Step by Step Solution
- Step 1: Write the proportion equation
721,756,670.66 : 995,910,435.96 = 420,391,580.09 : x - Step 2: Convert to fraction form
721,756,670.66/995,910,435.96 = 420,391,580.09/x - Step 3: Cross multiply
721,756,670.66x = 995,910,435.96 × 420,391,580.09 - Step 4: Simplify right side
721,756,670.66x = 418,672,361,801,345,152 - Step 5: Solve for x
x = 418,672,361,801,345,152/721,756,670.66 - Step 6: Final answer
x = 580,074,114.75
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.