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Finding the Fourth Proportional to 43.92, 66.24 and 40.92

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Solution

The fourth proportional to 43.92, 66.24 and 40.92 is: 61.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    43.92 : 66.24 = 40.92 : x
  2. Step 2: Convert to fraction form
    43.92/66.24 = 40.92/x
  3. Step 3: Cross multiply
    43.92x = 66.24 × 40.92
  4. Step 4: Simplify right side
    43.92x = 2,710.54
  5. Step 5: Solve for x
    x = 2,710.54/43.92
  6. Step 6: Final answer
    x = 61.72

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.