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Finding the Fourth Proportional to 868.51, 1,198.57 and 495.55

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Solution

The fourth proportional to 868.51, 1,198.57 and 495.55 is: 683.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    868.51 : 1,198.57 = 495.55 : x
  2. Step 2: Convert to fraction form
    868.51/1,198.57 = 495.55/x
  3. Step 3: Cross multiply
    868.51x = 1,198.57 × 495.55
  4. Step 4: Simplify right side
    868.51x = 593,947.20
  5. Step 5: Solve for x
    x = 593,947.20/868.51
  6. Step 6: Final answer
    x = 683.87

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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.