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Finding the Fourth Proportional to 1,791.78, 2,471.94 and 1,119.20

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Solution

The fourth proportional to 1,791.78, 2,471.94 and 1,119.20 is: 1,544.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.78 : 2,471.94 = 1,119.20 : x
  2. Step 2: Convert to fraction form
    1,791.78/2,471.94 = 1,119.20/x
  3. Step 3: Cross multiply
    1,791.78x = 2,471.94 × 1,119.20
  4. Step 4: Simplify right side
    1,791.78x = 2,766,582.89
  5. Step 5: Solve for x
    x = 2,766,582.89/1,791.78
  6. Step 6: Final answer
    x = 1,544.04

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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.