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Finding the Third Proportional to 3,912.75 and 4,515.75

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Solution

The third proportional to 3,912.75 and 4,515.75 is: 5,211.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,912.75 : 4,515.75 = 4,515.75 : x
  2. Step 2: Convert to fraction form
    3,912.75/4,515.75 = 4,515.75/x
  3. Step 3: Cross multiply
    3,912.75x = 4,515.75 × 4,515.75
  4. Step 4: Simplify right side
    3,912.75x = 20,391,998.06
  5. Step 5: Solve for x
    x = 20,391,998.06/3,912.75
  6. Step 6: Final answer
    x = 5,211.68

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Why These Related Problems?

These problems maintain the same ratio (1.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.