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Finding the Fourth Proportional to 639,687, 882,845.82 and 371,415

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Solution

The fourth proportional to 639,687, 882,845.82 and 371,415 is: 512,597.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,687 : 882,845.82 = 371,415 : x
  2. Step 2: Convert to fraction form
    639,687/882,845.82 = 371,415/x
  3. Step 3: Cross multiply
    639,687x = 882,845.82 × 371,415
  4. Step 4: Simplify right side
    639,687x = 327,902,180,235.30
  5. Step 5: Solve for x
    x = 327,902,180,235.30/639,687
  6. Step 6: Final answer
    x = 512,597.85

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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.