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Finding the Fourth Proportional to 664,190.40, 995,191.20 and 383,217.60

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Solution

The fourth proportional to 664,190.40, 995,191.20 and 383,217.60 is: 574,194.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,190.40 : 995,191.20 = 383,217.60 : x
  2. Step 2: Convert to fraction form
    664,190.40/995,191.20 = 383,217.60/x
  3. Step 3: Cross multiply
    664,190.40x = 995,191.20 × 383,217.60
  4. Step 4: Simplify right side
    664,190.40x = 381,374,783,205.12
  5. Step 5: Solve for x
    x = 381,374,783,205.12/664,190.40
  6. Step 6: Final answer
    x = 574,194.96

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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.