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Finding the Fourth Proportional to 344.62, 516.79 and 139.29

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Solution

The fourth proportional to 344.62, 516.79 and 139.29 is: 208.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.62 : 516.79 = 139.29 : x
  2. Step 2: Convert to fraction form
    344.62/516.79 = 139.29/x
  3. Step 3: Cross multiply
    344.62x = 516.79 × 139.29
  4. Step 4: Simplify right side
    344.62x = 71,983.68
  5. Step 5: Solve for x
    x = 71,983.68/344.62
  6. Step 6: Final answer
    x = 208.88

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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.