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Finding the Fourth Proportional to 229.11, 343.80 and 84.82

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Solution

The fourth proportional to 229.11, 343.80 and 84.82 is: 127.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.11 : 343.80 = 84.82 : x
  2. Step 2: Convert to fraction form
    229.11/343.80 = 84.82/x
  3. Step 3: Cross multiply
    229.11x = 343.80 × 84.82
  4. Step 4: Simplify right side
    229.11x = 29,161.12
  5. Step 5: Solve for x
    x = 29,161.12/229.11
  6. Step 6: Final answer
    x = 127.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.