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Finding the Fourth Proportional to 1,198.72, 1,794.60 and 891.94

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Solution

The fourth proportional to 1,198.72, 1,794.60 and 891.94 is: 1,335.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,198.72 : 1,794.60 = 891.94 : x
  2. Step 2: Convert to fraction form
    1,198.72/1,794.60 = 891.94/x
  3. Step 3: Cross multiply
    1,198.72x = 1,794.60 × 891.94
  4. Step 4: Simplify right side
    1,198.72x = 1,600,675.52
  5. Step 5: Solve for x
    x = 1,600,675.52/1,198.72
  6. Step 6: Final answer
    x = 1,335.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.