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Finding the Fourth Proportional to 415,226.60, 622,839.90 and 394,490.60

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Solution

The fourth proportional to 415,226.60, 622,839.90 and 394,490.60 is: 591,735.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,226.60 : 622,839.90 = 394,490.60 : x
  2. Step 2: Convert to fraction form
    415,226.60/622,839.90 = 394,490.60/x
  3. Step 3: Cross multiply
    415,226.60x = 622,839.90 × 394,490.60
  4. Step 4: Simplify right side
    415,226.60x = 245,704,485,854.94
  5. Step 5: Solve for x
    x = 245,704,485,854.94/415,226.60
  6. Step 6: Final answer
    x = 591,735.90

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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.