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Finding the Fourth Proportional to 618,464.45, 853,896.78 and 386,245.14

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Solution

The fourth proportional to 618,464.45, 853,896.78 and 386,245.14 is: 533,278.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,464.45 : 853,896.78 = 386,245.14 : x
  2. Step 2: Convert to fraction form
    618,464.45/853,896.78 = 386,245.14/x
  3. Step 3: Cross multiply
    618,464.45x = 853,896.78 × 386,245.14
  4. Step 4: Simplify right side
    618,464.45x = 329,813,481,336.65
  5. Step 5: Solve for x
    x = 329,813,481,336.65/618,464.45
  6. Step 6: Final answer
    x = 533,278.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.