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Finding the Fourth Proportional to 258.54, 356.58 and 223.98

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Solution

The fourth proportional to 258.54, 356.58 and 223.98 is: 308.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.54 : 356.58 = 223.98 : x
  2. Step 2: Convert to fraction form
    258.54/356.58 = 223.98/x
  3. Step 3: Cross multiply
    258.54x = 356.58 × 223.98
  4. Step 4: Simplify right side
    258.54x = 79,866.79
  5. Step 5: Solve for x
    x = 79,866.79/258.54
  6. Step 6: Final answer
    x = 308.91

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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.