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Finding the Third Proportional to 1,540 and 3,286

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Solution

The third proportional to 1,540 and 3,286 is: 7,011.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540 : 3,286 = 3,286 : x
  2. Step 2: Convert to fraction form
    1,540/3,286 = 3,286/x
  3. Step 3: Cross multiply
    1,540x = 3,286 × 3,286
  4. Step 4: Simplify right side
    1,540x = 10,797,796
  5. Step 5: Solve for x
    x = 10,797,796/1,540
  6. Step 6: Final answer
    x = 7,011.56

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.