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Finding the Fourth Proportional to 516.81, 712.84 and 330.22

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Solution

The fourth proportional to 516.81, 712.84 and 330.22 is: 455.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.81 : 712.84 = 330.22 : x
  2. Step 2: Convert to fraction form
    516.81/712.84 = 330.22/x
  3. Step 3: Cross multiply
    516.81x = 712.84 × 330.22
  4. Step 4: Simplify right side
    516.81x = 235,391.32
  5. Step 5: Solve for x
    x = 235,391.32/516.81
  6. Step 6: Final answer
    x = 455.47

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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.