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Finding the Fourth Proportional to 1,067.71, 1,601.78 and 451.42

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Solution

The fourth proportional to 1,067.71, 1,601.78 and 451.42 is: 677.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.71 : 1,601.78 = 451.42 : x
  2. Step 2: Convert to fraction form
    1,067.71/1,601.78 = 451.42/x
  3. Step 3: Cross multiply
    1,067.71x = 1,601.78 × 451.42
  4. Step 4: Simplify right side
    1,067.71x = 723,073.07
  5. Step 5: Solve for x
    x = 723,073.07/1,067.71
  6. Step 6: Final answer
    x = 677.22

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.