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Finding the Fourth Proportional to 394,755.92, 591,994.15 and 128,466.80

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Solution

The fourth proportional to 394,755.92, 591,994.15 and 128,466.80 is: 192,654.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,755.92 : 591,994.15 = 128,466.80 : x
  2. Step 2: Convert to fraction form
    394,755.92/591,994.15 = 128,466.80/x
  3. Step 3: Cross multiply
    394,755.92x = 591,994.15 × 128,466.80
  4. Step 4: Simplify right side
    394,755.92x = 76,051,594,069.22
  5. Step 5: Solve for x
    x = 76,051,594,069.22/394,755.92
  6. Step 6: Final answer
    x = 192,654.73

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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.