Home / 408,738.24-613,211.04-128,257.92

Finding the Fourth Proportional to 408,738.24, 613,211.04 and 128,257.92

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Solution

The fourth proportional to 408,738.24, 613,211.04 and 128,257.92 is: 192,419.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,738.24 : 613,211.04 = 128,257.92 : x
  2. Step 2: Convert to fraction form
    408,738.24/613,211.04 = 128,257.92/x
  3. Step 3: Cross multiply
    408,738.24x = 613,211.04 × 128,257.92
  4. Step 4: Simplify right side
    408,738.24x = 78,649,172,511.44
  5. Step 5: Solve for x
    x = 78,649,172,511.44/408,738.24
  6. Step 6: Final answer
    x = 192,419.41

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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.