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Finding the Fourth Proportional to 516.15, 773.55 and 272.61

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Solution

The fourth proportional to 516.15, 773.55 and 272.61 is: 408.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.15 : 773.55 = 272.61 : x
  2. Step 2: Convert to fraction form
    516.15/773.55 = 272.61/x
  3. Step 3: Cross multiply
    516.15x = 773.55 × 272.61
  4. Step 4: Simplify right side
    516.15x = 210,877.47
  5. Step 5: Solve for x
    x = 210,877.47/516.15
  6. Step 6: Final answer
    x = 408.56

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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.