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Finding the Fourth Proportional to 391,512.04, 587,190.30 and 191,746.60

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Solution

The fourth proportional to 391,512.04, 587,190.30 and 191,746.60 is: 287,581.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,512.04 : 587,190.30 = 191,746.60 : x
  2. Step 2: Convert to fraction form
    391,512.04/587,190.30 = 191,746.60/x
  3. Step 3: Cross multiply
    391,512.04x = 587,190.30 × 191,746.60
  4. Step 4: Simplify right side
    391,512.04x = 112,591,743,577.98
  5. Step 5: Solve for x
    x = 112,591,743,577.98/391,512.04
  6. Step 6: Final answer
    x = 287,581.82

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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.