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Finding the Fourth Proportional to 516.19, 712.43 and 329.49

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Solution

The fourth proportional to 516.19, 712.43 and 329.49 is: 454.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.19 : 712.43 = 329.49 : x
  2. Step 2: Convert to fraction form
    516.19/712.43 = 329.49/x
  3. Step 3: Cross multiply
    516.19x = 712.43 × 329.49
  4. Step 4: Simplify right side
    516.19x = 234,738.56
  5. Step 5: Solve for x
    x = 234,738.56/516.19
  6. Step 6: Final answer
    x = 454.75

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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.