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Finding the Third Proportional to 2,216 and 3,908

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Solution

The third proportional to 2,216 and 3,908 is: 6,891.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,216 : 3,908 = 3,908 : x
  2. Step 2: Convert to fraction form
    2,216/3,908 = 3,908/x
  3. Step 3: Cross multiply
    2,216x = 3,908 × 3,908
  4. Step 4: Simplify right side
    2,216x = 15,272,464
  5. Step 5: Solve for x
    x = 15,272,464/2,216
  6. Step 6: Final answer
    x = 6,891.91

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Why These Related Problems?

These problems maintain the same ratio (1.76) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.