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Finding the Fourth Proportional to 529,112.57, 730,180.85 and 287,399.85

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Solution

The fourth proportional to 529,112.57, 730,180.85 and 287,399.85 is: 396,614.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,112.57 : 730,180.85 = 287,399.85 : x
  2. Step 2: Convert to fraction form
    529,112.57/730,180.85 = 287,399.85/x
  3. Step 3: Cross multiply
    529,112.57x = 730,180.85 × 287,399.85
  4. Step 4: Simplify right side
    529,112.57x = 209,853,865,325.87
  5. Step 5: Solve for x
    x = 209,853,865,325.87/529,112.57
  6. Step 6: Final answer
    x = 396,614.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.