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Finding the Fourth Proportional to 639,387.31, 882,291.62 and 352,888.92

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Solution

The fourth proportional to 639,387.31, 882,291.62 and 352,888.92 is: 486,952.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,387.31 : 882,291.62 = 352,888.92 : x
  2. Step 2: Convert to fraction form
    639,387.31/882,291.62 = 352,888.92/x
  3. Step 3: Cross multiply
    639,387.31x = 882,291.62 × 352,888.92
  4. Step 4: Simplify right side
    639,387.31x = 311,350,936,906.85
  5. Step 5: Solve for x
    x = 311,350,936,906.85/639,387.31
  6. Step 6: Final answer
    x = 486,952.01

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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.