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Finding the Third Proportional to 2,166 and 3,491

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Solution

The third proportional to 2,166 and 3,491 is: 5,626.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,166 : 3,491 = 3,491 : x
  2. Step 2: Convert to fraction form
    2,166/3,491 = 3,491/x
  3. Step 3: Cross multiply
    2,166x = 3,491 × 3,491
  4. Step 4: Simplify right side
    2,166x = 12,187,081
  5. Step 5: Solve for x
    x = 12,187,081/2,166
  6. Step 6: Final answer
    x = 5,626.54

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Why These Related Problems?

These problems maintain the same ratio (1.61) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.