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Finding the Fourth Proportional to 574.09, 791.91 and 387.25

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Solution

The fourth proportional to 574.09, 791.91 and 387.25 is: 534.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.09 : 791.91 = 387.25 : x
  2. Step 2: Convert to fraction form
    574.09/791.91 = 387.25/x
  3. Step 3: Cross multiply
    574.09x = 791.91 × 387.25
  4. Step 4: Simplify right side
    574.09x = 306,665.17
  5. Step 5: Solve for x
    x = 306,665.17/574.09
  6. Step 6: Final answer
    x = 534.18

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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.