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Finding the Third Proportional to 159.38 and 220.88

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Solution

The third proportional to 159.38 and 220.88 is: 306.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    159.38 : 220.88 = 220.88 : x
  2. Step 2: Convert to fraction form
    159.38/220.88 = 220.88/x
  3. Step 3: Cross multiply
    159.38x = 220.88 × 220.88
  4. Step 4: Simplify right side
    159.38x = 48,785.77
  5. Step 5: Solve for x
    x = 48,785.77/159.38
  6. Step 6: Final answer
    x = 306.11

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.