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Finding the Fourth Proportional to 41.42, 61.78 and 39.45

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Solution

The fourth proportional to 41.42, 61.78 and 39.45 is: 58.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.42 : 61.78 = 39.45 : x
  2. Step 2: Convert to fraction form
    41.42/61.78 = 39.45/x
  3. Step 3: Cross multiply
    41.42x = 61.78 × 39.45
  4. Step 4: Simplify right side
    41.42x = 2,437.00
  5. Step 5: Solve for x
    x = 2,437.00/41.42
  6. Step 6: Final answer
    x = 58.83

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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.