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Finding the Fourth Proportional to 516.45, 712.62 and 306.75

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Solution

The fourth proportional to 516.45, 712.62 and 306.75 is: 423.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.45 : 712.62 = 306.75 : x
  2. Step 2: Convert to fraction form
    516.45/712.62 = 306.75/x
  3. Step 3: Cross multiply
    516.45x = 712.62 × 306.75
  4. Step 4: Simplify right side
    516.45x = 218,596.19
  5. Step 5: Solve for x
    x = 218,596.19/516.45
  6. Step 6: Final answer
    x = 423.27

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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.