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Finding the Fourth Proportional to 63.23, 87.24 and 38.66

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Solution

The fourth proportional to 63.23, 87.24 and 38.66 is: 53.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    63.23 : 87.24 = 38.66 : x
  2. Step 2: Convert to fraction form
    63.23/87.24 = 38.66/x
  3. Step 3: Cross multiply
    63.23x = 87.24 × 38.66
  4. Step 4: Simplify right side
    63.23x = 3,372.70
  5. Step 5: Solve for x
    x = 3,372.70/63.23
  6. Step 6: Final answer
    x = 53.34

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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.