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Finding the Fourth Proportional to 44.91, 61.96 and 31.11

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Solution

The fourth proportional to 44.91, 61.96 and 31.11 is: 42.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    44.91 : 61.96 = 31.11 : x
  2. Step 2: Convert to fraction form
    44.91/61.96 = 31.11/x
  3. Step 3: Cross multiply
    44.91x = 61.96 × 31.11
  4. Step 4: Simplify right side
    44.91x = 1,927.58
  5. Step 5: Solve for x
    x = 1,927.58/44.91
  6. Step 6: Final answer
    x = 42.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.