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Finding the Fourth Proportional to 243.97, 336.71 and 161.13

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Solution

The fourth proportional to 243.97, 336.71 and 161.13 is: 222.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.97 : 336.71 = 161.13 : x
  2. Step 2: Convert to fraction form
    243.97/336.71 = 161.13/x
  3. Step 3: Cross multiply
    243.97x = 336.71 × 161.13
  4. Step 4: Simplify right side
    243.97x = 54,254.08
  5. Step 5: Solve for x
    x = 54,254.08/243.97
  6. Step 6: Final answer
    x = 222.38

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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.