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Finding the Fourth Proportional to 866.17, 1,195.27 and 516.79

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Solution

The fourth proportional to 866.17, 1,195.27 and 516.79 is: 713.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.17 : 1,195.27 = 516.79 : x
  2. Step 2: Convert to fraction form
    866.17/1,195.27 = 516.79/x
  3. Step 3: Cross multiply
    866.17x = 1,195.27 × 516.79
  4. Step 4: Simplify right side
    866.17x = 617,703.58
  5. Step 5: Solve for x
    x = 617,703.58/866.17
  6. Step 6: Final answer
    x = 713.14

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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.