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Finding the Fourth Proportional to 394,432.20, 591,648.30 and 128,201.40

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Solution

The fourth proportional to 394,432.20, 591,648.30 and 128,201.40 is: 192,302.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,432.20 : 591,648.30 = 128,201.40 : x
  2. Step 2: Convert to fraction form
    394,432.20/591,648.30 = 128,201.40/x
  3. Step 3: Cross multiply
    394,432.20x = 591,648.30 × 128,201.40
  4. Step 4: Simplify right side
    394,432.20x = 75,850,140,367.62
  5. Step 5: Solve for x
    x = 75,850,140,367.62/394,432.20
  6. Step 6: Final answer
    x = 192,302.10

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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.