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Finding the Fourth Proportional to 394,666.56, 591,865.72 and 128,360.97

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Solution

The fourth proportional to 394,666.56, 591,865.72 and 128,360.97 is: 192,497.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,666.56 : 591,865.72 = 128,360.97 : x
  2. Step 2: Convert to fraction form
    394,666.56/591,865.72 = 128,360.97/x
  3. Step 3: Cross multiply
    394,666.56x = 591,865.72 × 128,360.97
  4. Step 4: Simplify right side
    394,666.56x = 75,972,457,608.05
  5. Step 5: Solve for x
    x = 75,972,457,608.05/394,666.56
  6. Step 6: Final answer
    x = 192,497.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.