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Finding the Fourth Proportional to 516.43, 775.05 and 379.68

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Solution

The fourth proportional to 516.43, 775.05 and 379.68 is: 569.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.43 : 775.05 = 379.68 : x
  2. Step 2: Convert to fraction form
    516.43/775.05 = 379.68/x
  3. Step 3: Cross multiply
    516.43x = 775.05 × 379.68
  4. Step 4: Simplify right side
    516.43x = 294,270.98
  5. Step 5: Solve for x
    x = 294,270.98/516.43
  6. Step 6: Final answer
    x = 569.82

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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.