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Finding the Fourth Proportional to 639,487.31, 882,494.60 and 353,006.71

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Solution

The fourth proportional to 639,487.31, 882,494.60 and 353,006.71 is: 487,150.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,487.31 : 882,494.60 = 353,006.71 : x
  2. Step 2: Convert to fraction form
    639,487.31/882,494.60 = 353,006.71/x
  3. Step 3: Cross multiply
    639,487.31x = 882,494.60 × 353,006.71
  4. Step 4: Simplify right side
    639,487.31x = 311,526,511,367.50
  5. Step 5: Solve for x
    x = 311,526,511,367.50/639,487.31
  6. Step 6: Final answer
    x = 487,150.42

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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.