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Finding the Fourth Proportional to 618,652.20, 927,978.30 and 543,856.80

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Solution

The fourth proportional to 618,652.20, 927,978.30 and 543,856.80 is: 815,785.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,652.20 : 927,978.30 = 543,856.80 : x
  2. Step 2: Convert to fraction form
    618,652.20/927,978.30 = 543,856.80/x
  3. Step 3: Cross multiply
    618,652.20x = 927,978.30 × 543,856.80
  4. Step 4: Simplify right side
    618,652.20x = 504,687,308,707.44
  5. Step 5: Solve for x
    x = 504,687,308,707.44/618,652.20
  6. Step 6: Final answer
    x = 815,785.20

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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.