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Finding the Fourth Proportional to 619,398.39, 928,470.10 and 419,738.97

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Solution

The fourth proportional to 619,398.39, 928,470.10 and 419,738.97 is: 629,183.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,398.39 : 928,470.10 = 419,738.97 : x
  2. Step 2: Convert to fraction form
    619,398.39/928,470.10 = 419,738.97/x
  3. Step 3: Cross multiply
    619,398.39x = 928,470.10 × 419,738.97
  4. Step 4: Simplify right side
    619,398.39x = 389,715,083,449.80
  5. Step 5: Solve for x
    x = 389,715,083,449.80/619,398.39
  6. Step 6: Final answer
    x = 629,183.24

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1.5x scale

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.