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Finding the Fourth Proportional to 391,528.86, 587,494.17 and 191,845.50

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Solution

The fourth proportional to 391,528.86, 587,494.17 and 191,845.50 is: 287,866.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,528.86 : 587,494.17 = 191,845.50 : x
  2. Step 2: Convert to fraction form
    391,528.86/587,494.17 = 191,845.50/x
  3. Step 3: Cross multiply
    391,528.86x = 587,494.17 × 191,845.50
  4. Step 4: Simplify right side
    391,528.86x = 112,708,112,790.74
  5. Step 5: Solve for x
    x = 112,708,112,790.74/391,528.86
  6. Step 6: Final answer
    x = 287,866.68

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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.