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Finding the Fourth Proportional to 47.98, 71.94 and 29.91

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Solution

The fourth proportional to 47.98, 71.94 and 29.91 is: 44.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.98 : 71.94 = 29.91 : x
  2. Step 2: Convert to fraction form
    47.98/71.94 = 29.91/x
  3. Step 3: Cross multiply
    47.98x = 71.94 × 29.91
  4. Step 4: Simplify right side
    47.98x = 2,151.73
  5. Step 5: Solve for x
    x = 2,151.73/47.98
  6. Step 6: Final answer
    x = 44.85

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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.