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Finding the Fourth Proportional to 229.50, 343.73 and 138.09

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Solution

The fourth proportional to 229.50, 343.73 and 138.09 is: 206.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.50 : 343.73 = 138.09 : x
  2. Step 2: Convert to fraction form
    229.50/343.73 = 138.09/x
  3. Step 3: Cross multiply
    229.50x = 343.73 × 138.09
  4. Step 4: Simplify right side
    229.50x = 47,464.99
  5. Step 5: Solve for x
    x = 47,464.99/229.50
  6. Step 6: Final answer
    x = 206.82

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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.