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Finding the Fourth Proportional to 41.36, 61.94 and 31.66

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Solution

The fourth proportional to 41.36, 61.94 and 31.66 is: 47.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    41.36 : 61.94 = 31.66 : x
  2. Step 2: Convert to fraction form
    41.36/61.94 = 31.66/x
  3. Step 3: Cross multiply
    41.36x = 61.94 × 31.66
  4. Step 4: Simplify right side
    41.36x = 1,960.94
  5. Step 5: Solve for x
    x = 1,960.94/41.36
  6. Step 6: Final answer
    x = 47.42

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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.