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Finding the Third Proportional to 2,171 and 3,315

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Solution

The third proportional to 2,171 and 3,315 is: 5,061.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171 : 3,315 = 3,315 : x
  2. Step 2: Convert to fraction form
    2,171/3,315 = 3,315/x
  3. Step 3: Cross multiply
    2,171x = 3,315 × 3,315
  4. Step 4: Simplify right side
    2,171x = 10,989,225
  5. Step 5: Solve for x
    x = 10,989,225/2,171
  6. Step 6: Final answer
    x = 5,061.83

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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.