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Finding the Fourth Proportional to 516.38, 774.92 and 393.36

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Solution

The fourth proportional to 516.38, 774.92 and 393.36 is: 590.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    516.38 : 774.92 = 393.36 : x
  2. Step 2: Convert to fraction form
    516.38/774.92 = 393.36/x
  3. Step 3: Cross multiply
    516.38x = 774.92 × 393.36
  4. Step 4: Simplify right side
    516.38x = 304,818.40
  5. Step 5: Solve for x
    x = 304,818.40/516.38
  6. Step 6: Final answer
    x = 590.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.