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Finding the Fourth Proportional to 542.77, 748.25 and 387.25

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Solution

The fourth proportional to 542.77, 748.25 and 387.25 is: 533.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    542.77 : 748.25 = 387.25 : x
  2. Step 2: Convert to fraction form
    542.77/748.25 = 387.25/x
  3. Step 3: Cross multiply
    542.77x = 748.25 × 387.25
  4. Step 4: Simplify right side
    542.77x = 289,757.88
  5. Step 5: Solve for x
    x = 289,757.88/542.77
  6. Step 6: Final answer
    x = 533.85

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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.