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Finding the Fourth Proportional to 229.48, 344.19 and 138.73

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Solution

The fourth proportional to 229.48, 344.19 and 138.73 is: 208.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    229.48 : 344.19 = 138.73 : x
  2. Step 2: Convert to fraction form
    229.48/344.19 = 138.73/x
  3. Step 3: Cross multiply
    229.48x = 344.19 × 138.73
  4. Step 4: Simplify right side
    229.48x = 47,749.48
  5. Step 5: Solve for x
    x = 47,749.48/229.48
  6. Step 6: Final answer
    x = 208.08

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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.