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Finding the Fourth Proportional to 936.27, 1,291.97 and 516.62

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Solution

The fourth proportional to 936.27, 1,291.97 and 516.62 is: 712.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.27 : 1,291.97 = 516.62 : x
  2. Step 2: Convert to fraction form
    936.27/1,291.97 = 516.62/x
  3. Step 3: Cross multiply
    936.27x = 1,291.97 × 516.62
  4. Step 4: Simplify right side
    936.27x = 667,457.54
  5. Step 5: Solve for x
    x = 667,457.54/936.27
  6. Step 6: Final answer
    x = 712.89

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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.