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Finding the Fourth Proportional to 542.78, 748.23 and 426.14

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Solution

The fourth proportional to 542.78, 748.23 and 426.14 is: 587.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.78 : 748.23 = 426.14 : x
  2. Step 2: Convert to fraction form
    542.78/748.23 = 426.14/x
  3. Step 3: Cross multiply
    542.78x = 748.23 × 426.14
  4. Step 4: Simplify right side
    542.78x = 318,850.73
  5. Step 5: Solve for x
    x = 318,850.73/542.78
  6. Step 6: Final answer
    x = 587.44

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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.