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Finding the Fourth Proportional to 516.14, 774.43 and 272.68

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Solution

The fourth proportional to 516.14, 774.43 and 272.68 is: 409.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.14 : 774.43 = 272.68 : x
  2. Step 2: Convert to fraction form
    516.14/774.43 = 272.68/x
  3. Step 3: Cross multiply
    516.14x = 774.43 × 272.68
  4. Step 4: Simplify right side
    516.14x = 211,168.95
  5. Step 5: Solve for x
    x = 211,168.95/516.14
  6. Step 6: Final answer
    x = 409.13

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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.