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Finding the Fourth Proportional to 519,165.77, 778,745.15 and 279,392.49

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Solution

The fourth proportional to 519,165.77, 778,745.15 and 279,392.49 is: 419,086.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,165.77 : 778,745.15 = 279,392.49 : x
  2. Step 2: Convert to fraction form
    519,165.77/778,745.15 = 279,392.49/x
  3. Step 3: Cross multiply
    519,165.77x = 778,745.15 × 279,392.49
  4. Step 4: Simplify right side
    519,165.77x = 217,575,546,184.68
  5. Step 5: Solve for x
    x = 217,575,546,184.68/519,165.77
  6. Step 6: Final answer
    x = 419,086.85

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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.