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Finding the Fourth Proportional to 618,355.44, 853,747.76 and 386,137.15

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Solution

The fourth proportional to 618,355.44, 853,747.76 and 386,137.15 is: 533,129.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,355.44 : 853,747.76 = 386,137.15 : x
  2. Step 2: Convert to fraction form
    618,355.44/853,747.76 = 386,137.15/x
  3. Step 3: Cross multiply
    618,355.44x = 853,747.76 × 386,137.15
  4. Step 4: Simplify right side
    618,355.44x = 329,663,726,865.28
  5. Step 5: Solve for x
    x = 329,663,726,865.28/618,355.44
  6. Step 6: Final answer
    x = 533,129.82

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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.