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Finding the Third Proportional to 124.17 and 219.09

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Solution

The third proportional to 124.17 and 219.09 is: 386.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    124.17 : 219.09 = 219.09 : x
  2. Step 2: Convert to fraction form
    124.17/219.09 = 219.09/x
  3. Step 3: Cross multiply
    124.17x = 219.09 × 219.09
  4. Step 4: Simplify right side
    124.17x = 48,002.07
  5. Step 5: Solve for x
    x = 48,002.07/124.17
  6. Step 6: Final answer
    x = 386.58

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.