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Finding the Fourth Proportional to 513.46, 769.99 and 220.98

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Solution

The fourth proportional to 513.46, 769.99 and 220.98 is: 331.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.46 : 769.99 = 220.98 : x
  2. Step 2: Convert to fraction form
    513.46/769.99 = 220.98/x
  3. Step 3: Cross multiply
    513.46x = 769.99 × 220.98
  4. Step 4: Simplify right side
    513.46x = 170,153.59
  5. Step 5: Solve for x
    x = 170,153.59/513.46
  6. Step 6: Final answer
    x = 331.39

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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.