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Finding the Fourth Proportional to 518.90, 778.67 and 484.73

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Solution

The fourth proportional to 518.90, 778.67 and 484.73 is: 727.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.90 : 778.67 = 484.73 : x
  2. Step 2: Convert to fraction form
    518.90/778.67 = 484.73/x
  3. Step 3: Cross multiply
    518.90x = 778.67 × 484.73
  4. Step 4: Simplify right side
    518.90x = 377,442.03
  5. Step 5: Solve for x
    x = 377,442.03/518.90
  6. Step 6: Final answer
    x = 727.40

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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.