Home / 664,431,997.80-996,647,996.70-392,334,205.80

Finding the Fourth Proportional to 664,431,997.80, 996,647,996.70 and 392,334,205.80

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Solution

The fourth proportional to 664,431,997.80, 996,647,996.70 and 392,334,205.80 is: 588,501,308.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,431,997.80 : 996,647,996.70 = 392,334,205.80 : x
  2. Step 2: Convert to fraction form
    664,431,997.80/996,647,996.70 = 392,334,205.80/x
  3. Step 3: Cross multiply
    664,431,997.80x = 996,647,996.70 × 392,334,205.80
  4. Step 4: Simplify right side
    664,431,997.80x = 391,019,100,247,455,552
  5. Step 5: Solve for x
    x = 391,019,100,247,455,552/664,431,997.80
  6. Step 6: Final answer
    x = 588,501,308.70

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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.