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Finding the Fourth Proportional to 632.66, 949.01 and 221.78

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Solution

The fourth proportional to 632.66, 949.01 and 221.78 is: 332.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.66 : 949.01 = 221.78 : x
  2. Step 2: Convert to fraction form
    632.66/949.01 = 221.78/x
  3. Step 3: Cross multiply
    632.66x = 949.01 × 221.78
  4. Step 4: Simplify right side
    632.66x = 210,470.33
  5. Step 5: Solve for x
    x = 210,470.33/632.66
  6. Step 6: Final answer
    x = 332.68

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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.