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Finding the Fourth Proportional to 516.09, 769.16 and 511.79

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Solution

The fourth proportional to 516.09, 769.16 and 511.79 is: 762.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.09 : 769.16 = 511.79 : x
  2. Step 2: Convert to fraction form
    516.09/769.16 = 511.79/x
  3. Step 3: Cross multiply
    516.09x = 769.16 × 511.79
  4. Step 4: Simplify right side
    516.09x = 393,645.83
  5. Step 5: Solve for x
    x = 393,645.83/516.09
  6. Step 6: Final answer
    x = 762.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.