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Finding the Fourth Proportional to 513.36, 769.82 and 205.25

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Solution

The fourth proportional to 513.36, 769.82 and 205.25 is: 307.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.36 : 769.82 = 205.25 : x
  2. Step 2: Convert to fraction form
    513.36/769.82 = 205.25/x
  3. Step 3: Cross multiply
    513.36x = 769.82 × 205.25
  4. Step 4: Simplify right side
    513.36x = 158,000.68
  5. Step 5: Solve for x
    x = 158,000.68/513.36
  6. Step 6: Final answer
    x = 307.78

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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.