Finding the Fourth Proportional to 543,349.20, 815,023.80 and 431,374.80
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Solution
The fourth proportional to 543,349.20, 815,023.80 and 431,374.80 is: 647,062.20
Step by Step Solution
- Step 1: Write the proportion equation
543,349.20 : 815,023.80 = 431,374.80 : x - Step 2: Convert to fraction form
543,349.20/815,023.80 = 431,374.80/x - Step 3: Cross multiply
543,349.20x = 815,023.80 × 431,374.80 - Step 4: Simplify right side
543,349.20x = 351,580,728,720.24 - Step 5: Solve for x
x = 351,580,728,720.24/543,349.20 - Step 6: Final answer
x = 647,062.20
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.