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Finding the Fourth Proportional to 516.21, 712.27 and 306.54

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Solution

The fourth proportional to 516.21, 712.27 and 306.54 is: 422.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.21 : 712.27 = 306.54 : x
  2. Step 2: Convert to fraction form
    516.21/712.27 = 306.54/x
  3. Step 3: Cross multiply
    516.21x = 712.27 × 306.54
  4. Step 4: Simplify right side
    516.21x = 218,337.71
  5. Step 5: Solve for x
    x = 218,337.71/516.21
  6. Step 6: Final answer
    x = 422.96

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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.