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Finding the Third Proportional to 221.97 and 331.69

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Solution

The third proportional to 221.97 and 331.69 is: 495.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    221.97 : 331.69 = 331.69 : x
  2. Step 2: Convert to fraction form
    221.97/331.69 = 331.69/x
  3. Step 3: Cross multiply
    221.97x = 331.69 × 331.69
  4. Step 4: Simplify right side
    221.97x = 110,016.60
  5. Step 5: Solve for x
    x = 110,016.60/221.97
  6. Step 6: Final answer
    x = 495.64

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.