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Finding the Fourth Proportional to 516.68, 712.68 and 329.97

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Solution

The fourth proportional to 516.68, 712.68 and 329.97 is: 455.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.68 : 712.68 = 329.97 : x
  2. Step 2: Convert to fraction form
    516.68/712.68 = 329.97/x
  3. Step 3: Cross multiply
    516.68x = 712.68 × 329.97
  4. Step 4: Simplify right side
    516.68x = 235,163.02
  5. Step 5: Solve for x
    x = 235,163.02/516.68
  6. Step 6: Final answer
    x = 455.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.