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Finding the Third Proportional to 3,328 and 3,992

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Solution

The third proportional to 3,328 and 3,992 is: 4,788.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,328 : 3,992 = 3,992 : x
  2. Step 2: Convert to fraction form
    3,328/3,992 = 3,992/x
  3. Step 3: Cross multiply
    3,328x = 3,992 × 3,992
  4. Step 4: Simplify right side
    3,328x = 15,936,064
  5. Step 5: Solve for x
    x = 15,936,064/3,328
  6. Step 6: Final answer
    x = 4,788.48

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Why These Related Problems?

These problems maintain the same ratio (1.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.