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Finding the Fourth Proportional to 394,667.56, 591,867.22 and 128,361.97

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Solution

The fourth proportional to 394,667.56, 591,867.22 and 128,361.97 is: 192,499.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,667.56 : 591,867.22 = 128,361.97 : x
  2. Step 2: Convert to fraction form
    394,667.56/591,867.22 = 128,361.97/x
  3. Step 3: Cross multiply
    394,667.56x = 591,867.22 × 128,361.97
  4. Step 4: Simplify right side
    394,667.56x = 75,973,242,337.62
  5. Step 5: Solve for x
    x = 75,973,242,337.62/394,667.56
  6. Step 6: Final answer
    x = 192,499.33

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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.