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Finding the Fourth Proportional to 394,297.95, 591,446.93 and 128,067.15

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Solution

The fourth proportional to 394,297.95, 591,446.93 and 128,067.15 is: 192,100.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,297.95 : 591,446.93 = 128,067.15 : x
  2. Step 2: Convert to fraction form
    394,297.95/591,446.93 = 128,067.15/x
  3. Step 3: Cross multiply
    394,297.95x = 591,446.93 × 128,067.15
  4. Step 4: Simplify right side
    394,297.95x = 75,744,922,061.01
  5. Step 5: Solve for x
    x = 75,744,922,061.01/394,297.95
  6. Step 6: Final answer
    x = 192,100.73

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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.