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Finding the Fourth Proportional to 664,393,231.80, 996,291,249.30 and 255,313,423.80

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Solution

The fourth proportional to 664,393,231.80, 996,291,249.30 and 255,313,423.80 is: 382,855,390.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,393,231.80 : 996,291,249.30 = 255,313,423.80 : x
  2. Step 2: Convert to fraction form
    664,393,231.80/996,291,249.30 = 255,313,423.80/x
  3. Step 3: Cross multiply
    664,393,231.80x = 996,291,249.30 × 255,313,423.80
  4. Step 4: Simplify right side
    664,393,231.80x = 254,366,529,960,762,368
  5. Step 5: Solve for x
    x = 254,366,529,960,762,368/664,393,231.80
  6. Step 6: Final answer
    x = 382,855,390.13

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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.