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Finding the Fourth Proportional to 528,793.60, 729,747.86 and 287,086.36

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Solution

The fourth proportional to 528,793.60, 729,747.86 and 287,086.36 is: 396,186.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,793.60 : 729,747.86 = 287,086.36 : x
  2. Step 2: Convert to fraction form
    528,793.60/729,747.86 = 287,086.36/x
  3. Step 3: Cross multiply
    528,793.60x = 729,747.86 × 287,086.36
  4. Step 4: Simplify right side
    528,793.60x = 209,500,656,845.19
  5. Step 5: Solve for x
    x = 209,500,656,845.19/528,793.60
  6. Step 6: Final answer
    x = 396,186.07

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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.