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Finding the Fourth Proportional to 3,879.74, 5,814.78 and 1,796.90

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Solution

The fourth proportional to 3,879.74, 5,814.78 and 1,796.90 is: 2,693.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,879.74 : 5,814.78 = 1,796.90 : x
  2. Step 2: Convert to fraction form
    3,879.74/5,814.78 = 1,796.90/x
  3. Step 3: Cross multiply
    3,879.74x = 5,814.78 × 1,796.90
  4. Step 4: Simplify right side
    3,879.74x = 10,448,578.18
  5. Step 5: Solve for x
    x = 10,448,578.18/3,879.74
  6. Step 6: Final answer
    x = 2,693.11

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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.