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Finding the Third Proportional to 220.56 and 330.87

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Solution

The third proportional to 220.56 and 330.87 is: 496.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.56 : 330.87 = 330.87 : x
  2. Step 2: Convert to fraction form
    220.56/330.87 = 330.87/x
  3. Step 3: Cross multiply
    220.56x = 330.87 × 330.87
  4. Step 4: Simplify right side
    220.56x = 109,473.10
  5. Step 5: Solve for x
    x = 109,473.10/220.56
  6. Step 6: Final answer
    x = 496.34

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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.