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Finding the Fourth Proportional to 1,067.49, 1,472.58 and 868.54

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Solution

The fourth proportional to 1,067.49, 1,472.58 and 868.54 is: 1,198.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.49 : 1,472.58 = 868.54 : x
  2. Step 2: Convert to fraction form
    1,067.49/1,472.58 = 868.54/x
  3. Step 3: Cross multiply
    1,067.49x = 1,472.58 × 868.54
  4. Step 4: Simplify right side
    1,067.49x = 1,278,993.71
  5. Step 5: Solve for x
    x = 1,278,993.71/1,067.49
  6. Step 6: Final answer
    x = 1,198.13

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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.