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Finding the Fourth Proportional to 344.68, 516.61 and 138.97

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Solution

The fourth proportional to 344.68, 516.61 and 138.97 is: 208.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.68 : 516.61 = 138.97 : x
  2. Step 2: Convert to fraction form
    344.68/516.61 = 138.97/x
  3. Step 3: Cross multiply
    344.68x = 516.61 × 138.97
  4. Step 4: Simplify right side
    344.68x = 71,793.29
  5. Step 5: Solve for x
    x = 71,793.29/344.68
  6. Step 6: Final answer
    x = 208.29

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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.