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Finding the Fourth Proportional to 1,791.33, 2,471.81 and 994.65

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Solution

The fourth proportional to 1,791.33, 2,471.81 and 994.65 is: 1,372.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.33 : 2,471.81 = 994.65 : x
  2. Step 2: Convert to fraction form
    1,791.33/2,471.81 = 994.65/x
  3. Step 3: Cross multiply
    1,791.33x = 2,471.81 × 994.65
  4. Step 4: Simplify right side
    1,791.33x = 2,458,585.82
  5. Step 5: Solve for x
    x = 2,458,585.82/1,791.33
  6. Step 6: Final answer
    x = 1,372.49

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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.