Finding the Fourth Proportional to 721,638,217.70, 995,860,740.14 and 391,613,356.70
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Solution
The fourth proportional to 721,638,217.70, 995,860,740.14 and 391,613,356.70 is: 540,426,432.09
Step by Step Solution
- Step 1: Write the proportion equation
721,638,217.70 : 995,860,740.14 = 391,613,356.70 : x - Step 2: Convert to fraction form
721,638,217.70/995,860,740.14 = 391,613,356.70/x - Step 3: Cross multiply
721,638,217.70x = 995,860,740.14 × 391,613,356.70 - Step 4: Simplify right side
721,638,217.70x = 389,992,367,250,237,504 - Step 5: Solve for x
x = 389,992,367,250,237,504/721,638,217.70 - Step 6: Final answer
x = 540,426,432.09
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1.5x scale
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.