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Finding the Fourth Proportional to 516.44, 712.14 and 385.22

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Solution

The fourth proportional to 516.44, 712.14 and 385.22 is: 531.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.44 : 712.14 = 385.22 : x
  2. Step 2: Convert to fraction form
    516.44/712.14 = 385.22/x
  3. Step 3: Cross multiply
    516.44x = 712.14 × 385.22
  4. Step 4: Simplify right side
    516.44x = 274,330.57
  5. Step 5: Solve for x
    x = 274,330.57/516.44
  6. Step 6: Final answer
    x = 531.20

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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.