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Finding the Fourth Proportional to 518,680.50, 778,327.02 and 219,141.78

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Solution

The fourth proportional to 518,680.50, 778,327.02 and 219,141.78 is: 328,842.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,680.50 : 778,327.02 = 219,141.78 : x
  2. Step 2: Convert to fraction form
    518,680.50/778,327.02 = 219,141.78/x
  3. Step 3: Cross multiply
    518,680.50x = 778,327.02 × 219,141.78
  4. Step 4: Simplify right side
    518,680.50x = 170,563,968,584.90
  5. Step 5: Solve for x
    x = 170,563,968,584.90/518,680.50
  6. Step 6: Final answer
    x = 328,842.07

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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.