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Finding the Fourth Proportional to 516.92, 775.66 and 343.66

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Solution

The fourth proportional to 516.92, 775.66 and 343.66 is: 515.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.92 : 775.66 = 343.66 : x
  2. Step 2: Convert to fraction form
    516.92/775.66 = 343.66/x
  3. Step 3: Cross multiply
    516.92x = 775.66 × 343.66
  4. Step 4: Simplify right side
    516.92x = 266,562.62
  5. Step 5: Solve for x
    x = 266,562.62/516.92
  6. Step 6: Final answer
    x = 515.68

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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.