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Finding the Fourth Proportional to 391,620.40, 587,430.60 and 96,132.40

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Solution

The fourth proportional to 391,620.40, 587,430.60 and 96,132.40 is: 144,198.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,620.40 : 587,430.60 = 96,132.40 : x
  2. Step 2: Convert to fraction form
    391,620.40/587,430.60 = 96,132.40/x
  3. Step 3: Cross multiply
    391,620.40x = 587,430.60 × 96,132.40
  4. Step 4: Simplify right side
    391,620.40x = 56,471,113,411.44
  5. Step 5: Solve for x
    x = 56,471,113,411.44/391,620.40
  6. Step 6: Final answer
    x = 144,198.60

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.