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Finding the Fourth Proportional to 365.90, 548.85 and 122.43

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Solution

The fourth proportional to 365.90, 548.85 and 122.43 is: 183.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    365.90 : 548.85 = 122.43 : x
  2. Step 2: Convert to fraction form
    365.90/548.85 = 122.43/x
  3. Step 3: Cross multiply
    365.90x = 548.85 × 122.43
  4. Step 4: Simplify right side
    365.90x = 67,193.25
  5. Step 5: Solve for x
    x = 67,193.25/365.90
  6. Step 6: Final answer
    x = 183.64

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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.