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Finding the Third Proportional to 3,489.50 and 5,112.75

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Solution

The third proportional to 3,489.50 and 5,112.75 is: 7,491.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,489.50 : 5,112.75 = 5,112.75 : x
  2. Step 2: Convert to fraction form
    3,489.50/5,112.75 = 5,112.75/x
  3. Step 3: Cross multiply
    3,489.50x = 5,112.75 × 5,112.75
  4. Step 4: Simplify right side
    3,489.50x = 26,140,212.56
  5. Step 5: Solve for x
    x = 26,140,212.56/3,489.50
  6. Step 6: Final answer
    x = 7,491.11

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.