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Finding the Fourth Proportional to 391,500.30, 587,359.80 and 191,827.20

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Solution

The fourth proportional to 391,500.30, 587,359.80 and 191,827.20 is: 287,794.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,500.30 : 587,359.80 = 191,827.20 : x
  2. Step 2: Convert to fraction form
    391,500.30/587,359.80 = 191,827.20/x
  3. Step 3: Cross multiply
    391,500.30x = 587,359.80 × 191,827.20
  4. Step 4: Simplify right side
    391,500.30x = 112,671,585,826.56
  5. Step 5: Solve for x
    x = 112,671,585,826.56/391,500.30
  6. Step 6: Final answer
    x = 287,794.38

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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.