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Finding the Fourth Proportional to 326,988.68, 490,517.58 and 139,949.96

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Solution

The fourth proportional to 326,988.68, 490,517.58 and 139,949.96 is: 209,939.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,988.68 : 490,517.58 = 139,949.96 : x
  2. Step 2: Convert to fraction form
    326,988.68/490,517.58 = 139,949.96/x
  3. Step 3: Cross multiply
    326,988.68x = 490,517.58 × 139,949.96
  4. Step 4: Simplify right side
    326,988.68x = 68,647,915,700.30
  5. Step 5: Solve for x
    x = 68,647,915,700.30/326,988.68
  6. Step 6: Final answer
    x = 209,939.73

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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.