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Finding the Third Proportional to 5,398 and 7,217

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Solution

The third proportional to 5,398 and 7,217 is: 9,648.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,398 : 7,217 = 7,217 : x
  2. Step 2: Convert to fraction form
    5,398/7,217 = 7,217/x
  3. Step 3: Cross multiply
    5,398x = 7,217 × 7,217
  4. Step 4: Simplify right side
    5,398x = 52,085,089
  5. Step 5: Solve for x
    x = 52,085,089/5,398
  6. Step 6: Final answer
    x = 9,648.96

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.