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Finding the Fourth Proportional to 327,799.58, 490,862.61 and 261,336.65

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Solution

The fourth proportional to 327,799.58, 490,862.61 and 261,336.65 is: 391,337.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,799.58 : 490,862.61 = 261,336.65 : x
  2. Step 2: Convert to fraction form
    327,799.58/490,862.61 = 261,336.65/x
  3. Step 3: Cross multiply
    327,799.58x = 490,862.61 × 261,336.65
  4. Step 4: Simplify right side
    327,799.58x = 128,280,391,334.81
  5. Step 5: Solve for x
    x = 128,280,391,334.81/327,799.58
  6. Step 6: Final answer
    x = 391,337.87

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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.