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Finding the Fourth Proportional to 618,717.20, 928,075.80 and 543,921.80

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Solution

The fourth proportional to 618,717.20, 928,075.80 and 543,921.80 is: 815,882.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,717.20 : 928,075.80 = 543,921.80 : x
  2. Step 2: Convert to fraction form
    618,717.20/928,075.80 = 543,921.80/x
  3. Step 3: Cross multiply
    618,717.20x = 928,075.80 × 543,921.80
  4. Step 4: Simplify right side
    618,717.20x = 504,800,659,672.44
  5. Step 5: Solve for x
    x = 504,800,659,672.44/618,717.20
  6. Step 6: Final answer
    x = 815,882.70

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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.