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Finding the Fourth Proportional to 1,066.78, 1,474.23 and 867.23

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Solution

The fourth proportional to 1,066.78, 1,474.23 and 867.23 is: 1,198.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,066.78 : 1,474.23 = 867.23 : x
  2. Step 2: Convert to fraction form
    1,066.78/1,474.23 = 867.23/x
  3. Step 3: Cross multiply
    1,066.78x = 1,474.23 × 867.23
  4. Step 4: Simplify right side
    1,066.78x = 1,278,496.48
  5. Step 5: Solve for x
    x = 1,278,496.48/1,066.78
  6. Step 6: Final answer
    x = 1,198.46

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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.