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Finding the Fourth Proportional to 868.26, 1,198.20 and 495.22

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Solution

The fourth proportional to 868.26, 1,198.20 and 495.22 is: 683.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.26 : 1,198.20 = 495.22 : x
  2. Step 2: Convert to fraction form
    868.26/1,198.20 = 495.22/x
  3. Step 3: Cross multiply
    868.26x = 1,198.20 × 495.22
  4. Step 4: Simplify right side
    868.26x = 593,372.60
  5. Step 5: Solve for x
    x = 593,372.60/868.26
  6. Step 6: Final answer
    x = 683.40

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Double scale
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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.