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Finding the Fourth Proportional to 258.44, 356.06 and 196.12

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Solution

The fourth proportional to 258.44, 356.06 and 196.12 is: 270.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.44 : 356.06 = 196.12 : x
  2. Step 2: Convert to fraction form
    258.44/356.06 = 196.12/x
  3. Step 3: Cross multiply
    258.44x = 356.06 × 196.12
  4. Step 4: Simplify right side
    258.44x = 69,830.49
  5. Step 5: Solve for x
    x = 69,830.49/258.44
  6. Step 6: Final answer
    x = 270.20

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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.