Home / 394,440.75-591,365.88-128,042.28

Finding the Fourth Proportional to 394,440.75, 591,365.88 and 128,042.28

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Solution

The fourth proportional to 394,440.75, 591,365.88 and 128,042.28 is: 191,967.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    394,440.75 : 591,365.88 = 128,042.28 : x
  2. Step 2: Convert to fraction form
    394,440.75/591,365.88 = 128,042.28/x
  3. Step 3: Cross multiply
    394,440.75x = 591,365.88 × 128,042.28
  4. Step 4: Simplify right side
    394,440.75x = 75,719,835,589.41
  5. Step 5: Solve for x
    x = 75,719,835,589.41/394,440.75
  6. Step 6: Final answer
    x = 191,967.58

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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.