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Finding the Fourth Proportional to 632.18, 948.06 and 221.24

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Solution

The fourth proportional to 632.18, 948.06 and 221.24 is: 331.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    632.18 : 948.06 = 221.24 : x
  2. Step 2: Convert to fraction form
    632.18/948.06 = 221.24/x
  3. Step 3: Cross multiply
    632.18x = 948.06 × 221.24
  4. Step 4: Simplify right side
    632.18x = 209,748.79
  5. Step 5: Solve for x
    x = 209,748.79/632.18
  6. Step 6: Final answer
    x = 331.79

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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.