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Finding the Fourth Proportional to 516.11, 712.22 and 283.23

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Solution

The fourth proportional to 516.11, 712.22 and 283.23 is: 390.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.11 : 712.22 = 283.23 : x
  2. Step 2: Convert to fraction form
    516.11/712.22 = 283.23/x
  3. Step 3: Cross multiply
    516.11x = 712.22 × 283.23
  4. Step 4: Simplify right side
    516.11x = 201,720.65
  5. Step 5: Solve for x
    x = 201,720.65/516.11
  6. Step 6: Final answer
    x = 390.85

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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.