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Finding the Fourth Proportional to 41.18, 61.78 and 39.02

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Solution

The fourth proportional to 41.18, 61.78 and 39.02 is: 58.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.18 : 61.78 = 39.02 : x
  2. Step 2: Convert to fraction form
    41.18/61.78 = 39.02/x
  3. Step 3: Cross multiply
    41.18x = 61.78 × 39.02
  4. Step 4: Simplify right side
    41.18x = 2,410.66
  5. Step 5: Solve for x
    x = 2,410.66/41.18
  6. Step 6: Final answer
    x = 58.54

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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.