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Finding the Fourth Proportional to 1,067.54, 1,473.40 and 674.78

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Solution

The fourth proportional to 1,067.54, 1,473.40 and 674.78 is: 931.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,067.54 : 1,473.40 = 674.78 : x
  2. Step 2: Convert to fraction form
    1,067.54/1,473.40 = 674.78/x
  3. Step 3: Cross multiply
    1,067.54x = 1,473.40 × 674.78
  4. Step 4: Simplify right side
    1,067.54x = 994,220.85
  5. Step 5: Solve for x
    x = 994,220.85/1,067.54
  6. Step 6: Final answer
    x = 931.32

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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.