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Finding the Fourth Proportional to 1,195.89, 1,791.99 and 805.05

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Solution

The fourth proportional to 1,195.89, 1,791.99 and 805.05 is: 1,206.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,195.89 : 1,791.99 = 805.05 : x
  2. Step 2: Convert to fraction form
    1,195.89/1,791.99 = 805.05/x
  3. Step 3: Cross multiply
    1,195.89x = 1,791.99 × 805.05
  4. Step 4: Simplify right side
    1,195.89x = 1,442,641.55
  5. Step 5: Solve for x
    x = 1,442,641.55/1,195.89
  6. Step 6: Final answer
    x = 1,206.33

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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.