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Finding the Fourth Proportional to 1,067.58, 1,473.43 and 674.78

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Solution

The fourth proportional to 1,067.58, 1,473.43 and 674.78 is: 931.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.58 : 1,473.43 = 674.78 : x
  2. Step 2: Convert to fraction form
    1,067.58/1,473.43 = 674.78/x
  3. Step 3: Cross multiply
    1,067.58x = 1,473.43 × 674.78
  4. Step 4: Simplify right side
    1,067.58x = 994,241.10
  5. Step 5: Solve for x
    x = 994,241.10/1,067.58
  6. Step 6: Final answer
    x = 931.30

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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.