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Finding the Third Proportional to 3,109 and 3,649

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Solution

The third proportional to 3,109 and 3,649 is: 4,282.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109 : 3,649 = 3,649 : x
  2. Step 2: Convert to fraction form
    3,109/3,649 = 3,649/x
  3. Step 3: Cross multiply
    3,109x = 3,649 × 3,649
  4. Step 4: Simplify right side
    3,109x = 13,315,201
  5. Step 5: Solve for x
    x = 13,315,201/3,109
  6. Step 6: Final answer
    x = 4,282.79

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Why These Related Problems?

These problems maintain the same ratio (1.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.