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Finding the Fourth Proportional to 513.76, 768.72 and 377.20

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Solution

The fourth proportional to 513.76, 768.72 and 377.20 is: 564.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.76 : 768.72 = 377.20 : x
  2. Step 2: Convert to fraction form
    513.76/768.72 = 377.20/x
  3. Step 3: Cross multiply
    513.76x = 768.72 × 377.20
  4. Step 4: Simplify right side
    513.76x = 289,961.18
  5. Step 5: Solve for x
    x = 289,961.18/513.76
  6. Step 6: Final answer
    x = 564.39

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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.