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Finding the Fourth Proportional to 258.73, 356.94 and 148.18

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Solution

The fourth proportional to 258.73, 356.94 and 148.18 is: 204.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.73 : 356.94 = 148.18 : x
  2. Step 2: Convert to fraction form
    258.73/356.94 = 148.18/x
  3. Step 3: Cross multiply
    258.73x = 356.94 × 148.18
  4. Step 4: Simplify right side
    258.73x = 52,891.37
  5. Step 5: Solve for x
    x = 52,891.37/258.73
  6. Step 6: Final answer
    x = 204.43

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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.