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Finding the Third Proportional to 3,378 and 3,981

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Solution

The third proportional to 3,378 and 3,981 is: 4,691.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,378 : 3,981 = 3,981 : x
  2. Step 2: Convert to fraction form
    3,378/3,981 = 3,981/x
  3. Step 3: Cross multiply
    3,378x = 3,981 × 3,981
  4. Step 4: Simplify right side
    3,378x = 15,848,361
  5. Step 5: Solve for x
    x = 15,848,361/3,378
  6. Step 6: Final answer
    x = 4,691.64

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Why These Related Problems?

These problems maintain the same ratio (1.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.