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Finding the Fourth Proportional to 543.43, 747.20 and 539.92

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Solution

The fourth proportional to 543.43, 747.20 and 539.92 is: 742.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.43 : 747.20 = 539.92 : x
  2. Step 2: Convert to fraction form
    543.43/747.20 = 539.92/x
  3. Step 3: Cross multiply
    543.43x = 747.20 × 539.92
  4. Step 4: Simplify right side
    543.43x = 403,428.22
  5. Step 5: Solve for x
    x = 403,428.22/543.43
  6. Step 6: Final answer
    x = 742.37

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.