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Finding the Fourth Proportional to 638,439,605.60, 957,659,408.40 and 347,194,191.20

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Solution

The fourth proportional to 638,439,605.60, 957,659,408.40 and 347,194,191.20 is: 520,791,286.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,439,605.60 : 957,659,408.40 = 347,194,191.20 : x
  2. Step 2: Convert to fraction form
    638,439,605.60/957,659,408.40 = 347,194,191.20/x
  3. Step 3: Cross multiply
    638,439,605.60x = 957,659,408.40 × 347,194,191.20
  4. Step 4: Simplify right side
    638,439,605.60x = 332,493,783,744,508,480
  5. Step 5: Solve for x
    x = 332,493,783,744,508,480/638,439,605.60
  6. Step 6: Final answer
    x = 520,791,286.80

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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.