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Finding the Fourth Proportional to 243.33, 335.64 and 196.70

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Solution

The fourth proportional to 243.33, 335.64 and 196.70 is: 271.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.33 : 335.64 = 196.70 : x
  2. Step 2: Convert to fraction form
    243.33/335.64 = 196.70/x
  3. Step 3: Cross multiply
    243.33x = 335.64 × 196.70
  4. Step 4: Simplify right side
    243.33x = 66,022.28
  5. Step 5: Solve for x
    x = 66,022.28/243.33
  6. Step 6: Final answer
    x = 271.33

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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.