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Finding the Third Proportional to 3,398 and 5,161

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Solution

The third proportional to 3,398 and 5,161 is: 7,838.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,398 : 5,161 = 5,161 : x
  2. Step 2: Convert to fraction form
    3,398/5,161 = 5,161/x
  3. Step 3: Cross multiply
    3,398x = 5,161 × 5,161
  4. Step 4: Simplify right side
    3,398x = 26,635,921
  5. Step 5: Solve for x
    x = 26,635,921/3,398
  6. Step 6: Final answer
    x = 7,838.71

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.