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Finding the Fourth Proportional to 365.45, 548.01 and 121.91

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Solution

The fourth proportional to 365.45, 548.01 and 121.91 is: 182.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.45 : 548.01 = 121.91 : x
  2. Step 2: Convert to fraction form
    365.45/548.01 = 121.91/x
  3. Step 3: Cross multiply
    365.45x = 548.01 × 121.91
  4. Step 4: Simplify right side
    365.45x = 66,805.16
  5. Step 5: Solve for x
    x = 66,805.16/365.45
  6. Step 6: Final answer
    x = 182.80

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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.