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Finding the Fourth Proportional to 866.04, 1,195.20 and 516.78

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Solution

The fourth proportional to 866.04, 1,195.20 and 516.78 is: 713.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.04 : 1,195.20 = 516.78 : x
  2. Step 2: Convert to fraction form
    866.04/1,195.20 = 516.78/x
  3. Step 3: Cross multiply
    866.04x = 1,195.20 × 516.78
  4. Step 4: Simplify right side
    866.04x = 617,655.46
  5. Step 5: Solve for x
    x = 617,655.46/866.04
  6. Step 6: Final answer
    x = 713.20

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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.