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Finding the Fourth Proportional to 386,468,661.20, 579,702,991.80 and 264,024,654.80

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Solution

The fourth proportional to 386,468,661.20, 579,702,991.80 and 264,024,654.80 is: 396,036,982.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,468,661.20 : 579,702,991.80 = 264,024,654.80 : x
  2. Step 2: Convert to fraction form
    386,468,661.20/579,702,991.80 = 264,024,654.80/x
  3. Step 3: Cross multiply
    386,468,661.20x = 579,702,991.80 × 264,024,654.80
  4. Step 4: Simplify right side
    386,468,661.20x = 153,055,882,296,522,240
  5. Step 5: Solve for x
    x = 153,055,882,296,522,240/386,468,661.20
  6. Step 6: Final answer
    x = 396,036,982.20

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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.