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Finding the Fourth Proportional to 574.22, 791.94 and 490.79

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Solution

The fourth proportional to 574.22, 791.94 and 490.79 is: 676.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.22 : 791.94 = 490.79 : x
  2. Step 2: Convert to fraction form
    574.22/791.94 = 490.79/x
  3. Step 3: Cross multiply
    574.22x = 791.94 × 490.79
  4. Step 4: Simplify right side
    574.22x = 388,680.05
  5. Step 5: Solve for x
    x = 388,680.05/574.22
  6. Step 6: Final answer
    x = 676.88

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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.