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Finding the Fourth Proportional to 516.48, 712.26 and 330.09

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Solution

The fourth proportional to 516.48, 712.26 and 330.09 is: 455.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.48 : 712.26 = 330.09 : x
  2. Step 2: Convert to fraction form
    516.48/712.26 = 330.09/x
  3. Step 3: Cross multiply
    516.48x = 712.26 × 330.09
  4. Step 4: Simplify right side
    516.48x = 235,109.90
  5. Step 5: Solve for x
    x = 235,109.90/516.48
  6. Step 6: Final answer
    x = 455.22

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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.