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Finding the Third Proportional to 2,217 and 4,398

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Solution

The third proportional to 2,217 and 4,398 is: 8,724.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217 : 4,398 = 4,398 : x
  2. Step 2: Convert to fraction form
    2,217/4,398 = 4,398/x
  3. Step 3: Cross multiply
    2,217x = 4,398 × 4,398
  4. Step 4: Simplify right side
    2,217x = 19,342,404
  5. Step 5: Solve for x
    x = 19,342,404/2,217
  6. Step 6: Final answer
    x = 8,724.58

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Why These Related Problems?

These problems maintain the same ratio (1.98) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.