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Finding the Fourth Proportional to 3,866.60, 5,791.80 and 2,133.20

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Solution

The fourth proportional to 3,866.60, 5,791.80 and 2,133.20 is: 3,195.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,866.60 : 5,791.80 = 2,133.20 : x
  2. Step 2: Convert to fraction form
    3,866.60/5,791.80 = 2,133.20/x
  3. Step 3: Cross multiply
    3,866.60x = 5,791.80 × 2,133.20
  4. Step 4: Simplify right side
    3,866.60x = 12,355,067.76
  5. Step 5: Solve for x
    x = 12,355,067.76/3,866.60
  6. Step 6: Final answer
    x = 3,195.33

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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.