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Finding the Fourth Proportional to 445,408.10, 668,112.15 and 419,747.30

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Solution

The fourth proportional to 445,408.10, 668,112.15 and 419,747.30 is: 629,620.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,408.10 : 668,112.15 = 419,747.30 : x
  2. Step 2: Convert to fraction form
    445,408.10/668,112.15 = 419,747.30/x
  3. Step 3: Cross multiply
    445,408.10x = 668,112.15 × 419,747.30
  4. Step 4: Simplify right side
    445,408.10x = 280,438,271,059.70
  5. Step 5: Solve for x
    x = 280,438,271,059.70/445,408.10
  6. Step 6: Final answer
    x = 629,620.95

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Double scale
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Similar ratio
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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.