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Finding the Fourth Proportional to 868.30, 1,198.28 and 495.27

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Solution

The fourth proportional to 868.30, 1,198.28 and 495.27 is: 683.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.30 : 1,198.28 = 495.27 : x
  2. Step 2: Convert to fraction form
    868.30/1,198.28 = 495.27/x
  3. Step 3: Cross multiply
    868.30x = 1,198.28 × 495.27
  4. Step 4: Simplify right side
    868.30x = 593,472.14
  5. Step 5: Solve for x
    x = 593,472.14/868.30
  6. Step 6: Final answer
    x = 683.49

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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.