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Finding the Fourth Proportional to 639,625, 882,760.26 and 371,353

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Solution

The fourth proportional to 639,625, 882,760.26 and 371,353 is: 512,512.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,625 : 882,760.26 = 371,353 : x
  2. Step 2: Convert to fraction form
    639,625/882,760.26 = 371,353/x
  3. Step 3: Cross multiply
    639,625x = 882,760.26 × 371,353
  4. Step 4: Simplify right side
    639,625x = 327,815,670,831.78
  5. Step 5: Solve for x
    x = 327,815,670,831.78/639,625
  6. Step 6: Final answer
    x = 512,512.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.