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Finding the Third Proportional to 3,109 and 3,385

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Solution

The third proportional to 3,109 and 3,385 is: 3,685.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,109 : 3,385 = 3,385 : x
  2. Step 2: Convert to fraction form
    3,109/3,385 = 3,385/x
  3. Step 3: Cross multiply
    3,109x = 3,385 × 3,385
  4. Step 4: Simplify right side
    3,109x = 11,458,225
  5. Step 5: Solve for x
    x = 11,458,225/3,109
  6. Step 6: Final answer
    x = 3,685.50

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Why These Related Problems?

These problems maintain the same ratio (1.09) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.