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Finding the Fourth Proportional to 516.69, 775.17 and 311.13

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Solution

The fourth proportional to 516.69, 775.17 and 311.13 is: 466.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.69 : 775.17 = 311.13 : x
  2. Step 2: Convert to fraction form
    516.69/775.17 = 311.13/x
  3. Step 3: Cross multiply
    516.69x = 775.17 × 311.13
  4. Step 4: Simplify right side
    516.69x = 241,178.64
  5. Step 5: Solve for x
    x = 241,178.64/516.69
  6. Step 6: Final answer
    x = 466.78

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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.