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Finding the Fourth Proportional to 625,198.70, 862,456.78 and 395,368.92

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Solution

The fourth proportional to 625,198.70, 862,456.78 and 395,368.92 is: 545,408.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,198.70 : 862,456.78 = 395,368.92 : x
  2. Step 2: Convert to fraction form
    625,198.70/862,456.78 = 395,368.92/x
  3. Step 3: Cross multiply
    625,198.70x = 862,456.78 × 395,368.92
  4. Step 4: Simplify right side
    625,198.70x = 340,988,605,655.28
  5. Step 5: Solve for x
    x = 340,988,605,655.28/625,198.70
  6. Step 6: Final answer
    x = 545,408.37

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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.