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Finding the Fourth Proportional to 386,992,866.30, 543,320,562.90 and 386,992,866.30

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Solution

The fourth proportional to 386,992,866.30, 543,320,562.90 and 386,992,866.30 is: 543,320,562.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,992,866.30 : 543,320,562.90 = 386,992,866.30 : x
  2. Step 2: Convert to fraction form
    386,992,866.30/543,320,562.90 = 386,992,866.30/x
  3. Step 3: Cross multiply
    386,992,866.30x = 543,320,562.90 × 386,992,866.30
  4. Step 4: Simplify right side
    386,992,866.30x = 210,261,181,956,400,448
  5. Step 5: Solve for x
    x = 210,261,181,956,400,448/386,992,866.30
  6. Step 6: Final answer
    x = 543,320,562.90

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.