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Finding the Fourth Proportional to 513.82, 769.71 and 239.55

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Solution

The fourth proportional to 513.82, 769.71 and 239.55 is: 358.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.82 : 769.71 = 239.55 : x
  2. Step 2: Convert to fraction form
    513.82/769.71 = 239.55/x
  3. Step 3: Cross multiply
    513.82x = 769.71 × 239.55
  4. Step 4: Simplify right side
    513.82x = 184,384.03
  5. Step 5: Solve for x
    x = 184,384.03/513.82
  6. Step 6: Final answer
    x = 358.85

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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.