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Finding the Fourth Proportional to 516.04, 774.04 and 131.28

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Solution

The fourth proportional to 516.04, 774.04 and 131.28 is: 196.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.04 : 774.04 = 131.28 : x
  2. Step 2: Convert to fraction form
    516.04/774.04 = 131.28/x
  3. Step 3: Cross multiply
    516.04x = 774.04 × 131.28
  4. Step 4: Simplify right side
    516.04x = 101,615.97
  5. Step 5: Solve for x
    x = 101,615.97/516.04
  6. Step 6: Final answer
    x = 196.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.