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Finding the Fourth Proportional to 518.73, 778.28 and 241.21

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Solution

The fourth proportional to 518.73, 778.28 and 241.21 is: 361.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.73 : 778.28 = 241.21 : x
  2. Step 2: Convert to fraction form
    518.73/778.28 = 241.21/x
  3. Step 3: Cross multiply
    518.73x = 778.28 × 241.21
  4. Step 4: Simplify right side
    518.73x = 187,723.82
  5. Step 5: Solve for x
    x = 187,723.82/518.73
  6. Step 6: Final answer
    x = 361.89

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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.