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Finding the Fourth Proportional to 62.47, 86.21 and 37.90

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Solution

The fourth proportional to 62.47, 86.21 and 37.90 is: 52.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.47 : 86.21 = 37.90 : x
  2. Step 2: Convert to fraction form
    62.47/86.21 = 37.90/x
  3. Step 3: Cross multiply
    62.47x = 86.21 × 37.90
  4. Step 4: Simplify right side
    62.47x = 3,267.17
  5. Step 5: Solve for x
    x = 3,267.17/62.47
  6. Step 6: Final answer
    x = 52.30

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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.