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Finding the Fourth Proportional to 2,767.80, 3,819.42 and 1,719.84

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Solution

The fourth proportional to 2,767.80, 3,819.42 and 1,719.84 is: 2,373.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,767.80 : 3,819.42 = 1,719.84 : x
  2. Step 2: Convert to fraction form
    2,767.80/3,819.42 = 1,719.84/x
  3. Step 3: Cross multiply
    2,767.80x = 3,819.42 × 1,719.84
  4. Step 4: Simplify right side
    2,767.80x = 6,568,791.29
  5. Step 5: Solve for x
    x = 6,568,791.29/2,767.80
  6. Step 6: Final answer
    x = 2,373.29

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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.