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Finding the Fourth Proportional to 779.27, 1,168.55 and 231.26

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Solution

The fourth proportional to 779.27, 1,168.55 and 231.26 is: 346.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.27 : 1,168.55 = 231.26 : x
  2. Step 2: Convert to fraction form
    779.27/1,168.55 = 231.26/x
  3. Step 3: Cross multiply
    779.27x = 1,168.55 × 231.26
  4. Step 4: Simplify right side
    779.27x = 270,238.87
  5. Step 5: Solve for x
    x = 270,238.87/779.27
  6. Step 6: Final answer
    x = 346.78

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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.