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Finding the Third Proportional to 3,924 and 5,418

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Solution

The third proportional to 3,924 and 5,418 is: 7,480.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924 : 5,418 = 5,418 : x
  2. Step 2: Convert to fraction form
    3,924/5,418 = 5,418/x
  3. Step 3: Cross multiply
    3,924x = 5,418 × 5,418
  4. Step 4: Simplify right side
    3,924x = 29,354,724
  5. Step 5: Solve for x
    x = 29,354,724/3,924
  6. Step 6: Final answer
    x = 7,480.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.