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Finding the Fourth Proportional to 542.18, 747.87 and 355.68

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Solution

The fourth proportional to 542.18, 747.87 and 355.68 is: 490.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.18 : 747.87 = 355.68 : x
  2. Step 2: Convert to fraction form
    542.18/747.87 = 355.68/x
  3. Step 3: Cross multiply
    542.18x = 747.87 × 355.68
  4. Step 4: Simplify right side
    542.18x = 266,002.40
  5. Step 5: Solve for x
    x = 266,002.40/542.18
  6. Step 6: Final answer
    x = 490.62

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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.