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Finding the Fourth Proportional to 42.37, 63.19 and 38.87

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Solution

The fourth proportional to 42.37, 63.19 and 38.87 is: 57.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    42.37 : 63.19 = 38.87 : x
  2. Step 2: Convert to fraction form
    42.37/63.19 = 38.87/x
  3. Step 3: Cross multiply
    42.37x = 63.19 × 38.87
  4. Step 4: Simplify right side
    42.37x = 2,456.20
  5. Step 5: Solve for x
    x = 2,456.20/42.37
  6. Step 6: Final answer
    x = 57.97

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.