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Finding the Fourth Proportional to 258.38, 356.84 and 254.96

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Solution

The fourth proportional to 258.38, 356.84 and 254.96 is: 352.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.38 : 356.84 = 254.96 : x
  2. Step 2: Convert to fraction form
    258.38/356.84 = 254.96/x
  3. Step 3: Cross multiply
    258.38x = 356.84 × 254.96
  4. Step 4: Simplify right side
    258.38x = 90,979.93
  5. Step 5: Solve for x
    x = 90,979.93/258.38
  6. Step 6: Final answer
    x = 352.12

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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.