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Finding the Third Proportional to 3,215 and 3,665

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Solution

The third proportional to 3,215 and 3,665 is: 4,177.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,215 : 3,665 = 3,665 : x
  2. Step 2: Convert to fraction form
    3,215/3,665 = 3,665/x
  3. Step 3: Cross multiply
    3,215x = 3,665 × 3,665
  4. Step 4: Simplify right side
    3,215x = 13,432,225
  5. Step 5: Solve for x
    x = 13,432,225/3,215
  6. Step 6: Final answer
    x = 4,177.99

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Why These Related Problems?

These problems maintain the same ratio (1.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.