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Finding the Third Proportional to 2,108 and 2,809

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Solution

The third proportional to 2,108 and 2,809 is: 3,743.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,108 : 2,809 = 2,809 : x
  2. Step 2: Convert to fraction form
    2,108/2,809 = 2,809/x
  3. Step 3: Cross multiply
    2,108x = 2,809 × 2,809
  4. Step 4: Simplify right side
    2,108x = 7,890,481
  5. Step 5: Solve for x
    x = 7,890,481/2,108
  6. Step 6: Final answer
    x = 3,743.11

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.