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Finding the Fourth Proportional to 394,544.66, 591,891.26 and 128,381.31

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Solution

The fourth proportional to 394,544.66, 591,891.26 and 128,381.31 is: 192,596.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,544.66 : 591,891.26 = 128,381.31 : x
  2. Step 2: Convert to fraction form
    394,544.66/591,891.26 = 128,381.31/x
  3. Step 3: Cross multiply
    394,544.66x = 591,891.26 × 128,381.31
  4. Step 4: Simplify right side
    394,544.66x = 75,987,774,694.44
  5. Step 5: Solve for x
    x = 75,987,774,694.44/394,544.66
  6. Step 6: Final answer
    x = 192,596.13

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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.