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Finding the Fourth Proportional to 619,445.20, 928,540.20 and 419,785.60

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Solution

The fourth proportional to 619,445.20, 928,540.20 and 419,785.60 is: 629,253.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,445.20 : 928,540.20 = 419,785.60 : x
  2. Step 2: Convert to fraction form
    619,445.20/928,540.20 = 419,785.60/x
  3. Step 3: Cross multiply
    619,445.20x = 928,540.20 × 419,785.60
  4. Step 4: Simplify right side
    619,445.20x = 389,787,804,981.12
  5. Step 5: Solve for x
    x = 389,787,804,981.12/619,445.20
  6. Step 6: Final answer
    x = 629,253.09

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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.