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Finding the Fourth Proportional to 936.27, 1,292.09 and 516.60

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Solution

The fourth proportional to 936.27, 1,292.09 and 516.60 is: 712.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.27 : 1,292.09 = 516.60 : x
  2. Step 2: Convert to fraction form
    936.27/1,292.09 = 516.60/x
  3. Step 3: Cross multiply
    936.27x = 1,292.09 × 516.60
  4. Step 4: Simplify right side
    936.27x = 667,491.11
  5. Step 5: Solve for x
    x = 667,491.11/936.27
  6. Step 6: Final answer
    x = 712.93

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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.