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Finding the Fourth Proportional to 365.69, 548.87 and 211.73

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Solution

The fourth proportional to 365.69, 548.87 and 211.73 is: 317.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.69 : 548.87 = 211.73 : x
  2. Step 2: Convert to fraction form
    365.69/548.87 = 211.73/x
  3. Step 3: Cross multiply
    365.69x = 548.87 × 211.73
  4. Step 4: Simplify right side
    365.69x = 116,208.44
  5. Step 5: Solve for x
    x = 116,208.44/365.69
  6. Step 6: Final answer
    x = 317.78

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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.