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Finding the Fourth Proportional to 1,198.27, 1,653.60 and 674.30

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Solution

The fourth proportional to 1,198.27, 1,653.60 and 674.30 is: 930.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.27 : 1,653.60 = 674.30 : x
  2. Step 2: Convert to fraction form
    1,198.27/1,653.60 = 674.30/x
  3. Step 3: Cross multiply
    1,198.27x = 1,653.60 × 674.30
  4. Step 4: Simplify right side
    1,198.27x = 1,115,029.14
  5. Step 5: Solve for x
    x = 1,115,029.14/1,198.27
  6. Step 6: Final answer
    x = 930.53

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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.