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Finding the Fourth Proportional to 394,605.39, 591,913.55 and 128,367.30

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Solution

The fourth proportional to 394,605.39, 591,913.55 and 128,367.30 is: 192,552.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,605.39 : 591,913.55 = 128,367.30 : x
  2. Step 2: Convert to fraction form
    394,605.39/591,913.55 = 128,367.30/x
  3. Step 3: Cross multiply
    394,605.39x = 591,913.55 × 128,367.30
  4. Step 4: Simplify right side
    394,605.39x = 75,982,344,567.83
  5. Step 5: Solve for x
    x = 75,982,344,567.83/394,605.39
  6. Step 6: Final answer
    x = 192,552.73

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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.