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Finding the Fourth Proportional to 421,910.44, 632,785.02 and 126,422.44

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Solution

The fourth proportional to 421,910.44, 632,785.02 and 126,422.44 is: 189,609.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,910.44 : 632,785.02 = 126,422.44 : x
  2. Step 2: Convert to fraction form
    421,910.44/632,785.02 = 126,422.44/x
  3. Step 3: Cross multiply
    421,910.44x = 632,785.02 × 126,422.44
  4. Step 4: Simplify right side
    421,910.44x = 79,998,226,223.85
  5. Step 5: Solve for x
    x = 79,998,226,223.85/421,910.44
  6. Step 6: Final answer
    x = 189,609.50

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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.