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Finding the Third Proportional to 104.20 and 219.38

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Solution

The third proportional to 104.20 and 219.38 is: 461.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    104.20 : 219.38 = 219.38 : x
  2. Step 2: Convert to fraction form
    104.20/219.38 = 219.38/x
  3. Step 3: Cross multiply
    104.20x = 219.38 × 219.38
  4. Step 4: Simplify right side
    104.20x = 48,125.39
  5. Step 5: Solve for x
    x = 48,125.39/104.20
  6. Step 6: Final answer
    x = 461.84

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Why These Related Problems?

These problems maintain the same ratio (2.11) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.