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Finding the Fourth Proportional to 519,781.76, 779,945.85 and 368,952.20

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Solution

The fourth proportional to 519,781.76, 779,945.85 and 368,952.20 is: 553,622.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,781.76 : 779,945.85 = 368,952.20 : x
  2. Step 2: Convert to fraction form
    519,781.76/779,945.85 = 368,952.20/x
  3. Step 3: Cross multiply
    519,781.76x = 779,945.85 × 368,952.20
  4. Step 4: Simplify right side
    519,781.76x = 287,762,737,238.37
  5. Step 5: Solve for x
    x = 287,762,737,238.37/519,781.76
  6. Step 6: Final answer
    x = 553,622.23

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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.