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Finding the Fourth Proportional to 394,251.40, 591,231.30 and 128,020.60

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Solution

The fourth proportional to 394,251.40, 591,231.30 and 128,020.60 is: 191,983.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,251.40 : 591,231.30 = 128,020.60 : x
  2. Step 2: Convert to fraction form
    394,251.40/591,231.30 = 128,020.60/x
  3. Step 3: Cross multiply
    394,251.40x = 591,231.30 × 128,020.60
  4. Step 4: Simplify right side
    394,251.40x = 75,689,785,764.78
  5. Step 5: Solve for x
    x = 75,689,785,764.78/394,251.40
  6. Step 6: Final answer
    x = 191,983.56

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1.5x scale

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.