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Finding the Third Proportional to 1,189.69 and 2,616.75

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Solution

The third proportional to 1,189.69 and 2,616.75 is: 5,755.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,189.69 : 2,616.75 = 2,616.75 : x
  2. Step 2: Convert to fraction form
    1,189.69/2,616.75 = 2,616.75/x
  3. Step 3: Cross multiply
    1,189.69x = 2,616.75 × 2,616.75
  4. Step 4: Simplify right side
    1,189.69x = 6,847,380.56
  5. Step 5: Solve for x
    x = 6,847,380.56/1,189.69
  6. Step 6: Final answer
    x = 5,755.61

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Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.