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Finding the Fourth Proportional to 516.10, 712.05 and 306.35

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Solution

The fourth proportional to 516.10, 712.05 and 306.35 is: 422.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.10 : 712.05 = 306.35 : x
  2. Step 2: Convert to fraction form
    516.10/712.05 = 306.35/x
  3. Step 3: Cross multiply
    516.10x = 712.05 × 306.35
  4. Step 4: Simplify right side
    516.10x = 218,132.96
  5. Step 5: Solve for x
    x = 218,132.96/516.10
  6. Step 6: Final answer
    x = 422.66

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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.