Finding the Fourth Proportional to 721,656.20, 995,860.98 and 399,379.88
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Solution
The fourth proportional to 721,656.20, 995,860.98 and 399,379.88 is: 551,130.63
Step by Step Solution
- Step 1: Write the proportion equation
721,656.20 : 995,860.98 = 399,379.88 : x - Step 2: Convert to fraction form
721,656.20/995,860.98 = 399,379.88/x - Step 3: Cross multiply
721,656.20x = 995,860.98 × 399,379.88 - Step 4: Simplify right side
721,656.20x = 397,726,838,689.08 - Step 5: Solve for x
x = 397,726,838,689.08/721,656.20 - Step 6: Final answer
x = 551,130.63
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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.