Home / 394,568.48-591,908.88-128,243.36

Finding the Fourth Proportional to 394,568.48, 591,908.88 and 128,243.36

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Solution

The fourth proportional to 394,568.48, 591,908.88 and 128,243.36 is: 192,383.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,568.48 : 591,908.88 = 128,243.36 : x
  2. Step 2: Convert to fraction form
    394,568.48/591,908.88 = 128,243.36/x
  3. Step 3: Cross multiply
    394,568.48x = 591,908.88 × 128,243.36
  4. Step 4: Simplify right side
    394,568.48x = 75,908,383,585.04
  5. Step 5: Solve for x
    x = 75,908,383,585.04/394,568.48
  6. Step 6: Final answer
    x = 192,383.29

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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.