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Finding the Fourth Proportional to 664,998.60, 996,841.80 and 327,763.20

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Solution

The fourth proportional to 664,998.60, 996,841.80 and 327,763.20 is: 491,321.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,998.60 : 996,841.80 = 327,763.20 : x
  2. Step 2: Convert to fraction form
    664,998.60/996,841.80 = 327,763.20/x
  3. Step 3: Cross multiply
    664,998.60x = 996,841.80 × 327,763.20
  4. Step 4: Simplify right side
    664,998.60x = 326,728,058,261.76
  5. Step 5: Solve for x
    x = 326,728,058,261.76/664,998.60
  6. Step 6: Final answer
    x = 491,321.42

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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.