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Finding the Fourth Proportional to 344.72, 516.79 and 221.39

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Solution

The fourth proportional to 344.72, 516.79 and 221.39 is: 331.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    344.72 : 516.79 = 221.39 : x
  2. Step 2: Convert to fraction form
    344.72/516.79 = 221.39/x
  3. Step 3: Cross multiply
    344.72x = 516.79 × 221.39
  4. Step 4: Simplify right side
    344.72x = 114,412.14
  5. Step 5: Solve for x
    x = 114,412.14/344.72
  6. Step 6: Final answer
    x = 331.90

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.