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Finding the Fourth Proportional to 344, 516.20 and 272

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Solution

The fourth proportional to 344, 516.20 and 272 is: 408.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    344 : 516.20 = 272 : x
  2. Step 2: Convert to fraction form
    344/516.20 = 272/x
  3. Step 3: Cross multiply
    344x = 516.20 × 272
  4. Step 4: Simplify right side
    344x = 140,406.40
  5. Step 5: Solve for x
    x = 140,406.40/344
  6. Step 6: Final answer
    x = 408.16

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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.