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Finding the Fourth Proportional to 2,135.41, 3,203 and 819.79

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Solution

The fourth proportional to 2,135.41, 3,203 and 819.79 is: 1,229.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,135.41 : 3,203 = 819.79 : x
  2. Step 2: Convert to fraction form
    2,135.41/3,203 = 819.79/x
  3. Step 3: Cross multiply
    2,135.41x = 3,203 × 819.79
  4. Step 4: Simplify right side
    2,135.41x = 2,625,787.37
  5. Step 5: Solve for x
    x = 2,625,787.37/2,135.41
  6. Step 6: Final answer
    x = 1,229.64

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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.