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Finding the Fourth Proportional to 516.49, 712.18 and 329.68

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Solution

The fourth proportional to 516.49, 712.18 and 329.68 is: 454.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.49 : 712.18 = 329.68 : x
  2. Step 2: Convert to fraction form
    516.49/712.18 = 329.68/x
  3. Step 3: Cross multiply
    516.49x = 712.18 × 329.68
  4. Step 4: Simplify right side
    516.49x = 234,791.50
  5. Step 5: Solve for x
    x = 234,791.50/516.49
  6. Step 6: Final answer
    x = 454.59

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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.