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Finding the Fourth Proportional to 519.42, 779.37 and 383.61

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Solution

The fourth proportional to 519.42, 779.37 and 383.61 is: 575.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.42 : 779.37 = 383.61 : x
  2. Step 2: Convert to fraction form
    519.42/779.37 = 383.61/x
  3. Step 3: Cross multiply
    519.42x = 779.37 × 383.61
  4. Step 4: Simplify right side
    519.42x = 298,974.13
  5. Step 5: Solve for x
    x = 298,974.13/519.42
  6. Step 6: Final answer
    x = 575.59

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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.