Home / 639,576.38-959,043.26-212,961.40

Finding the Fourth Proportional to 639,576.38, 959,043.26 and 212,961.40

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Solution

The fourth proportional to 639,576.38, 959,043.26 and 212,961.40 is: 319,335.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,576.38 : 959,043.26 = 212,961.40 : x
  2. Step 2: Convert to fraction form
    639,576.38/959,043.26 = 212,961.40/x
  3. Step 3: Cross multiply
    639,576.38x = 959,043.26 × 212,961.40
  4. Step 4: Simplify right side
    639,576.38x = 204,239,195,310.16
  5. Step 5: Solve for x
    x = 204,239,195,310.16/639,576.38
  6. Step 6: Final answer
    x = 319,335.11

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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.