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Finding the Fourth Proportional to 518.90, 778.38 and 230.54

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Solution

The fourth proportional to 518.90, 778.38 and 230.54 is: 345.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.90 : 778.38 = 230.54 : x
  2. Step 2: Convert to fraction form
    518.90/778.38 = 230.54/x
  3. Step 3: Cross multiply
    518.90x = 778.38 × 230.54
  4. Step 4: Simplify right side
    518.90x = 179,447.73
  5. Step 5: Solve for x
    x = 179,447.73/518.90
  6. Step 6: Final answer
    x = 345.82

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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.