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Finding the Fourth Proportional to 365.67, 548.64 and 122.20

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Solution

The fourth proportional to 365.67, 548.64 and 122.20 is: 183.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.67 : 548.64 = 122.20 : x
  2. Step 2: Convert to fraction form
    365.67/548.64 = 122.20/x
  3. Step 3: Cross multiply
    365.67x = 548.64 × 122.20
  4. Step 4: Simplify right side
    365.67x = 67,042.44
  5. Step 5: Solve for x
    x = 67,042.44/365.67
  6. Step 6: Final answer
    x = 183.34

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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.