Finding the Fourth Proportional to 721,386,740.08, 995,515,630.68 and 391,361,879.12
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Solution
The fourth proportional to 721,386,740.08, 995,515,630.68 and 391,361,879.12 is: 540,080,439.89
Step by Step Solution
- Step 1: Write the proportion equation
721,386,740.08 : 995,515,630.68 = 391,361,879.12 : x - Step 2: Convert to fraction form
721,386,740.08/995,515,630.68 = 391,361,879.12/x - Step 3: Cross multiply
721,386,740.08x = 995,515,630.68 × 391,361,879.12 - Step 4: Simplify right side
721,386,740.08x = 389,606,867,916,256,704 - Step 5: Solve for x
x = 389,606,867,916,256,704/721,386,740.08 - Step 6: Final answer
x = 540,080,439.89
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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.