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Finding the Third Proportional to 3,928.50 and 6,481.13

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Solution

The third proportional to 3,928.50 and 6,481.13 is: 10,692.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,928.50 : 6,481.13 = 6,481.13 : x
  2. Step 2: Convert to fraction form
    3,928.50/6,481.13 = 6,481.13/x
  3. Step 3: Cross multiply
    3,928.50x = 6,481.13 × 6,481.13
  4. Step 4: Simplify right side
    3,928.50x = 42,004,981.27
  5. Step 5: Solve for x
    x = 42,004,981.27/3,928.50
  6. Step 6: Final answer
    x = 10,692.37

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Why These Related Problems?

These problems maintain the same ratio (1.65) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.