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Finding the Fourth Proportional to 513.54, 769.56 and 220.63

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Solution

The fourth proportional to 513.54, 769.56 and 220.63 is: 330.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.54 : 769.56 = 220.63 : x
  2. Step 2: Convert to fraction form
    513.54/769.56 = 220.63/x
  3. Step 3: Cross multiply
    513.54x = 769.56 × 220.63
  4. Step 4: Simplify right side
    513.54x = 169,788.02
  5. Step 5: Solve for x
    x = 169,788.02/513.54
  6. Step 6: Final answer
    x = 330.62

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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.