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Finding the Fourth Proportional to 391,662,052.80, 587,493,079.20 and 391,662,052.80

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Solution

The fourth proportional to 391,662,052.80, 587,493,079.20 and 391,662,052.80 is: 587,493,079.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,662,052.80 : 587,493,079.20 = 391,662,052.80 : x
  2. Step 2: Convert to fraction form
    391,662,052.80/587,493,079.20 = 391,662,052.80/x
  3. Step 3: Cross multiply
    391,662,052.80x = 587,493,079.20 × 391,662,052.80
  4. Step 4: Simplify right side
    391,662,052.80x = 230,098,745,405,264,992
  5. Step 5: Solve for x
    x = 230,098,745,405,264,992/391,662,052.80
  6. Step 6: Final answer
    x = 587,493,079.20

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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.