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Finding the Fourth Proportional to 632.72, 949.08 and 221.85

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Solution

The fourth proportional to 632.72, 949.08 and 221.85 is: 332.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.72 : 949.08 = 221.85 : x
  2. Step 2: Convert to fraction form
    632.72/949.08 = 221.85/x
  3. Step 3: Cross multiply
    632.72x = 949.08 × 221.85
  4. Step 4: Simplify right side
    632.72x = 210,553.40
  5. Step 5: Solve for x
    x = 210,553.40/632.72
  6. Step 6: Final answer
    x = 332.78

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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.