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Finding the Fourth Proportional to 516.56, 771.09 and 479.44

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Solution

The fourth proportional to 516.56, 771.09 and 479.44 is: 715.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.56 : 771.09 = 479.44 : x
  2. Step 2: Convert to fraction form
    516.56/771.09 = 479.44/x
  3. Step 3: Cross multiply
    516.56x = 771.09 × 479.44
  4. Step 4: Simplify right side
    516.56x = 369,691.39
  5. Step 5: Solve for x
    x = 369,691.39/516.56
  6. Step 6: Final answer
    x = 715.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.