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Finding the Fourth Proportional to 1,067.22, 1,472.77 and 674.42

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Solution

The fourth proportional to 1,067.22, 1,472.77 and 674.42 is: 930.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.22 : 1,472.77 = 674.42 : x
  2. Step 2: Convert to fraction form
    1,067.22/1,472.77 = 674.42/x
  3. Step 3: Cross multiply
    1,067.22x = 1,472.77 × 674.42
  4. Step 4: Simplify right side
    1,067.22x = 993,265.54
  5. Step 5: Solve for x
    x = 993,265.54/1,067.22
  6. Step 6: Final answer
    x = 930.70

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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.