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Finding the Fourth Proportional to 258.91, 356.97 and 223.36

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Solution

The fourth proportional to 258.91, 356.97 and 223.36 is: 307.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.91 : 356.97 = 223.36 : x
  2. Step 2: Convert to fraction form
    258.91/356.97 = 223.36/x
  3. Step 3: Cross multiply
    258.91x = 356.97 × 223.36
  4. Step 4: Simplify right side
    258.91x = 79,732.82
  5. Step 5: Solve for x
    x = 79,732.82/258.91
  6. Step 6: Final answer
    x = 307.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.