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Finding the Fourth Proportional to 258.93, 355.73 and 231.66

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Solution

The fourth proportional to 258.93, 355.73 and 231.66 is: 318.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.93 : 355.73 = 231.66 : x
  2. Step 2: Convert to fraction form
    258.93/355.73 = 231.66/x
  3. Step 3: Cross multiply
    258.93x = 355.73 × 231.66
  4. Step 4: Simplify right side
    258.93x = 82,407.25
  5. Step 5: Solve for x
    x = 82,407.25/258.93
  6. Step 6: Final answer
    x = 318.26

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.