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Finding the Fourth Proportional to 430,279.92, 645,419.21 and 130,759.20

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Solution

The fourth proportional to 430,279.92, 645,419.21 and 130,759.20 is: 196,138.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,279.92 : 645,419.21 = 130,759.20 : x
  2. Step 2: Convert to fraction form
    430,279.92/645,419.21 = 130,759.20/x
  3. Step 3: Cross multiply
    430,279.92x = 645,419.21 × 130,759.20
  4. Step 4: Simplify right side
    430,279.92x = 84,394,498,910.44
  5. Step 5: Solve for x
    x = 84,394,498,910.44/430,279.92
  6. Step 6: Final answer
    x = 196,138.59

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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.