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Finding the Fourth Proportional to 866.05, 1,195.21 and 516.69

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Solution

The fourth proportional to 866.05, 1,195.21 and 516.69 is: 713.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.05 : 1,195.21 = 516.69 : x
  2. Step 2: Convert to fraction form
    866.05/1,195.21 = 516.69/x
  3. Step 3: Cross multiply
    866.05x = 1,195.21 × 516.69
  4. Step 4: Simplify right side
    866.05x = 617,553.05
  5. Step 5: Solve for x
    x = 617,553.05/866.05
  6. Step 6: Final answer
    x = 713.07

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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.