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Finding the Fourth Proportional to 243.43, 335.81 and 234.12

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Solution

The fourth proportional to 243.43, 335.81 and 234.12 is: 322.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.43 : 335.81 = 234.12 : x
  2. Step 2: Convert to fraction form
    243.43/335.81 = 234.12/x
  3. Step 3: Cross multiply
    243.43x = 335.81 × 234.12
  4. Step 4: Simplify right side
    243.43x = 78,619.84
  5. Step 5: Solve for x
    x = 78,619.84/243.43
  6. Step 6: Final answer
    x = 322.97

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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.