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Finding the Third Proportional to 2,151 and 3,286

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Solution

The third proportional to 2,151 and 3,286 is: 5,019.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151 : 3,286 = 3,286 : x
  2. Step 2: Convert to fraction form
    2,151/3,286 = 3,286/x
  3. Step 3: Cross multiply
    2,151x = 3,286 × 3,286
  4. Step 4: Simplify right side
    2,151x = 10,797,796
  5. Step 5: Solve for x
    x = 10,797,796/2,151
  6. Step 6: Final answer
    x = 5,019.90

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.