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Finding the Fourth Proportional to 221.91, 333.20 and 100.41

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Solution

The fourth proportional to 221.91, 333.20 and 100.41 is: 150.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.91 : 333.20 = 100.41 : x
  2. Step 2: Convert to fraction form
    221.91/333.20 = 100.41/x
  3. Step 3: Cross multiply
    221.91x = 333.20 × 100.41
  4. Step 4: Simplify right side
    221.91x = 33,456.11
  5. Step 5: Solve for x
    x = 33,456.11/221.91
  6. Step 6: Final answer
    x = 150.76

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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.