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Finding the Fourth Proportional to 513.93, 771.26 and 205.87

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Solution

The fourth proportional to 513.93, 771.26 and 205.87 is: 308.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.93 : 771.26 = 205.87 : x
  2. Step 2: Convert to fraction form
    513.93/771.26 = 205.87/x
  3. Step 3: Cross multiply
    513.93x = 771.26 × 205.87
  4. Step 4: Simplify right side
    513.93x = 158,777.88
  5. Step 5: Solve for x
    x = 158,777.88/513.93
  6. Step 6: Final answer
    x = 308.95

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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.