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Finding the Fourth Proportional to 681.01, 939.27 and 495.11

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Solution

The fourth proportional to 681.01, 939.27 and 495.11 is: 682.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    681.01 : 939.27 = 495.11 : x
  2. Step 2: Convert to fraction form
    681.01/939.27 = 495.11/x
  3. Step 3: Cross multiply
    681.01x = 939.27 × 495.11
  4. Step 4: Simplify right side
    681.01x = 465,044.78
  5. Step 5: Solve for x
    x = 465,044.78/681.01
  6. Step 6: Final answer
    x = 682.88

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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.