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Finding the Fourth Proportional to 516.80, 775.38 and 273.18

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Solution

The fourth proportional to 516.80, 775.38 and 273.18 is: 409.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.80 : 775.38 = 273.18 : x
  2. Step 2: Convert to fraction form
    516.80/775.38 = 273.18/x
  3. Step 3: Cross multiply
    516.80x = 775.38 × 273.18
  4. Step 4: Simplify right side
    516.80x = 211,818.31
  5. Step 5: Solve for x
    x = 211,818.31/516.80
  6. Step 6: Final answer
    x = 409.87

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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.