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Finding the Fourth Proportional to 41.24, 61.92 and 39.80

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Solution

The fourth proportional to 41.24, 61.92 and 39.80 is: 59.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.24 : 61.92 = 39.80 : x
  2. Step 2: Convert to fraction form
    41.24/61.92 = 39.80/x
  3. Step 3: Cross multiply
    41.24x = 61.92 × 39.80
  4. Step 4: Simplify right side
    41.24x = 2,464.42
  5. Step 5: Solve for x
    x = 2,464.42/41.24
  6. Step 6: Final answer
    x = 59.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.