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Finding the Fourth Proportional to 1,067.68, 1,472.52 and 674.56

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Solution

The fourth proportional to 1,067.68, 1,472.52 and 674.56 is: 930.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.68 : 1,472.52 = 674.56 : x
  2. Step 2: Convert to fraction form
    1,067.68/1,472.52 = 674.56/x
  3. Step 3: Cross multiply
    1,067.68x = 1,472.52 × 674.56
  4. Step 4: Simplify right side
    1,067.68x = 993,303.09
  5. Step 5: Solve for x
    x = 993,303.09/1,067.68
  6. Step 6: Final answer
    x = 930.34

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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.