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Finding the Fourth Proportional to 518.03, 775.44 and 387.27

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Solution

The fourth proportional to 518.03, 775.44 and 387.27 is: 579.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.03 : 775.44 = 387.27 : x
  2. Step 2: Convert to fraction form
    518.03/775.44 = 387.27/x
  3. Step 3: Cross multiply
    518.03x = 775.44 × 387.27
  4. Step 4: Simplify right side
    518.03x = 300,304.65
  5. Step 5: Solve for x
    x = 300,304.65/518.03
  6. Step 6: Final answer
    x = 579.71

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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.