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Finding the Fourth Proportional to 639,217.44, 958,576.91 and 239,640.42

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Solution

The fourth proportional to 639,217.44, 958,576.91 and 239,640.42 is: 359,367.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,217.44 : 958,576.91 = 239,640.42 : x
  2. Step 2: Convert to fraction form
    639,217.44/958,576.91 = 239,640.42/x
  3. Step 3: Cross multiply
    639,217.44x = 958,576.91 × 239,640.42
  4. Step 4: Simplify right side
    639,217.44x = 229,713,769,120.92
  5. Step 5: Solve for x
    x = 229,713,769,120.92/639,217.44
  6. Step 6: Final answer
    x = 359,367.18

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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.