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Finding the Fourth Proportional to 344.38, 516.50 and 138.89

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Solution

The fourth proportional to 344.38, 516.50 and 138.89 is: 208.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.38 : 516.50 = 138.89 : x
  2. Step 2: Convert to fraction form
    344.38/516.50 = 138.89/x
  3. Step 3: Cross multiply
    344.38x = 516.50 × 138.89
  4. Step 4: Simplify right side
    344.38x = 71,736.69
  5. Step 5: Solve for x
    x = 71,736.69/344.38
  6. Step 6: Final answer
    x = 208.31

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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.