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Finding the Fourth Proportional to 519,191.16, 778,783.20 and 279,417.88

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Solution

The fourth proportional to 519,191.16, 778,783.20 and 279,417.88 is: 419,124.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,191.16 : 778,783.20 = 279,417.88 : x
  2. Step 2: Convert to fraction form
    519,191.16/778,783.20 = 279,417.88/x
  3. Step 3: Cross multiply
    519,191.16x = 778,783.20 × 279,417.88
  4. Step 4: Simplify right side
    519,191.16x = 217,605,950,723.62
  5. Step 5: Solve for x
    x = 217,605,950,723.62/519,191.16
  6. Step 6: Final answer
    x = 419,124.91

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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.