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Finding the Fourth Proportional to 221.97, 333.57 and 113.85

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Solution

The fourth proportional to 221.97, 333.57 and 113.85 is: 171.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.97 : 333.57 = 113.85 : x
  2. Step 2: Convert to fraction form
    221.97/333.57 = 113.85/x
  3. Step 3: Cross multiply
    221.97x = 333.57 × 113.85
  4. Step 4: Simplify right side
    221.97x = 37,976.94
  5. Step 5: Solve for x
    x = 37,976.94/221.97
  6. Step 6: Final answer
    x = 171.09

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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.