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Finding the Fourth Proportional to 936.38, 1,292.19 and 516.75

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Solution

The fourth proportional to 936.38, 1,292.19 and 516.75 is: 713.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.38 : 1,292.19 = 516.75 : x
  2. Step 2: Convert to fraction form
    936.38/1,292.19 = 516.75/x
  3. Step 3: Cross multiply
    936.38x = 1,292.19 × 516.75
  4. Step 4: Simplify right side
    936.38x = 667,739.18
  5. Step 5: Solve for x
    x = 667,739.18/936.38
  6. Step 6: Final answer
    x = 713.11

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1.5x scale

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.