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Finding the Fourth Proportional to 936.46, 1,292.40 and 516.86

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Solution

The fourth proportional to 936.46, 1,292.40 and 516.86 is: 713.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    936.46 : 1,292.40 = 516.86 : x
  2. Step 2: Convert to fraction form
    936.46/1,292.40 = 516.86/x
  3. Step 3: Cross multiply
    936.46x = 1,292.40 × 516.86
  4. Step 4: Simplify right side
    936.46x = 667,982.43
  5. Step 5: Solve for x
    x = 667,982.43/936.46
  6. Step 6: Final answer
    x = 713.30

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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.