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Finding the Fourth Proportional to 778.88, 1,168.52 and 231.09

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Solution

The fourth proportional to 778.88, 1,168.52 and 231.09 is: 346.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    778.88 : 1,168.52 = 231.09 : x
  2. Step 2: Convert to fraction form
    778.88/1,168.52 = 231.09/x
  3. Step 3: Cross multiply
    778.88x = 1,168.52 × 231.09
  4. Step 4: Simplify right side
    778.88x = 270,033.29
  5. Step 5: Solve for x
    x = 270,033.29/778.88
  6. Step 6: Final answer
    x = 346.69

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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.