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Finding the Fourth Proportional to 516.69, 775.16 and 170.05

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Solution

The fourth proportional to 516.69, 775.16 and 170.05 is: 255.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.69 : 775.16 = 170.05 : x
  2. Step 2: Convert to fraction form
    516.69/775.16 = 170.05/x
  3. Step 3: Cross multiply
    516.69x = 775.16 × 170.05
  4. Step 4: Simplify right side
    516.69x = 131,815.96
  5. Step 5: Solve for x
    x = 131,815.96/516.69
  6. Step 6: Final answer
    x = 255.12

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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.