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Finding the Fourth Proportional to 62.72, 86.49 and 38.14

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Solution

The fourth proportional to 62.72, 86.49 and 38.14 is: 52.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.72 : 86.49 = 38.14 : x
  2. Step 2: Convert to fraction form
    62.72/86.49 = 38.14/x
  3. Step 3: Cross multiply
    62.72x = 86.49 × 38.14
  4. Step 4: Simplify right side
    62.72x = 3,298.30
  5. Step 5: Solve for x
    x = 3,298.30/62.72
  6. Step 6: Final answer
    x = 52.59

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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.