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Finding the Fourth Proportional to 621,608.80, 932,542.80 and 355,151.20

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Solution

The fourth proportional to 621,608.80, 932,542.80 and 355,151.20 is: 532,800.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,608.80 : 932,542.80 = 355,151.20 : x
  2. Step 2: Convert to fraction form
    621,608.80/932,542.80 = 355,151.20/x
  3. Step 3: Cross multiply
    621,608.80x = 932,542.80 × 355,151.20
  4. Step 4: Simplify right side
    621,608.80x = 331,193,694,471.36
  5. Step 5: Solve for x
    x = 331,193,694,471.36/621,608.80
  6. Step 6: Final answer
    x = 532,800.85

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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.