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Finding the Fourth Proportional to 258.64, 356.77 and 196.49

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Solution

The fourth proportional to 258.64, 356.77 and 196.49 is: 271.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    258.64 : 356.77 = 196.49 : x
  2. Step 2: Convert to fraction form
    258.64/356.77 = 196.49/x
  3. Step 3: Cross multiply
    258.64x = 356.77 × 196.49
  4. Step 4: Simplify right side
    258.64x = 70,101.74
  5. Step 5: Solve for x
    x = 70,101.74/258.64
  6. Step 6: Final answer
    x = 271.04

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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.