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Finding the Fourth Proportional to 779.22, 1,168.92 and 231.39

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Solution

The fourth proportional to 779.22, 1,168.92 and 231.39 is: 347.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.22 : 1,168.92 = 231.39 : x
  2. Step 2: Convert to fraction form
    779.22/1,168.92 = 231.39/x
  3. Step 3: Cross multiply
    779.22x = 1,168.92 × 231.39
  4. Step 4: Simplify right side
    779.22x = 270,476.40
  5. Step 5: Solve for x
    x = 270,476.40/779.22
  6. Step 6: Final answer
    x = 347.11

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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.