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Finding the Third Proportional to 3,709 and 4,015

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Solution

The third proportional to 3,709 and 4,015 is: 4,346.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,709 : 4,015 = 4,015 : x
  2. Step 2: Convert to fraction form
    3,709/4,015 = 4,015/x
  3. Step 3: Cross multiply
    3,709x = 4,015 × 4,015
  4. Step 4: Simplify right side
    3,709x = 16,120,225
  5. Step 5: Solve for x
    x = 16,120,225/3,709
  6. Step 6: Final answer
    x = 4,346.25

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Why These Related Problems?

These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.