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Finding the Fourth Proportional to 516.23, 712.15 and 329.93

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Solution

The fourth proportional to 516.23, 712.15 and 329.93 is: 455.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.23 : 712.15 = 329.93 : x
  2. Step 2: Convert to fraction form
    516.23/712.15 = 329.93/x
  3. Step 3: Cross multiply
    516.23x = 712.15 × 329.93
  4. Step 4: Simplify right side
    516.23x = 234,959.65
  5. Step 5: Solve for x
    x = 234,959.65/516.23
  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.