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Finding the Fourth Proportional to 516.11, 774.41 and 285.17

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Solution

The fourth proportional to 516.11, 774.41 and 285.17 is: 427.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.11 : 774.41 = 285.17 : x
  2. Step 2: Convert to fraction form
    516.11/774.41 = 285.17/x
  3. Step 3: Cross multiply
    516.11x = 774.41 × 285.17
  4. Step 4: Simplify right side
    516.11x = 220,833.20
  5. Step 5: Solve for x
    x = 220,833.20/516.11
  6. Step 6: Final answer
    x = 427.88

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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.