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Finding the Fourth Proportional to 538.27, 742.64 and 351.97

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Solution

The fourth proportional to 538.27, 742.64 and 351.97 is: 485.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    538.27 : 742.64 = 351.97 : x
  2. Step 2: Convert to fraction form
    538.27/742.64 = 351.97/x
  3. Step 3: Cross multiply
    538.27x = 742.64 × 351.97
  4. Step 4: Simplify right side
    538.27x = 261,383.38
  5. Step 5: Solve for x
    x = 261,383.38/538.27
  6. Step 6: Final answer
    x = 485.60

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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.