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Finding the Fourth Proportional to 41.14, 61.43 and 40.72

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Solution

The fourth proportional to 41.14, 61.43 and 40.72 is: 60.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.14 : 61.43 = 40.72 : x
  2. Step 2: Convert to fraction form
    41.14/61.43 = 40.72/x
  3. Step 3: Cross multiply
    41.14x = 61.43 × 40.72
  4. Step 4: Simplify right side
    41.14x = 2,501.43
  5. Step 5: Solve for x
    x = 2,501.43/41.14
  6. Step 6: Final answer
    x = 60.80

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.