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Finding the Fourth Proportional to 220.25, 330.38 and 124.06

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Solution

The fourth proportional to 220.25, 330.38 and 124.06 is: 186.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    220.25 : 330.38 = 124.06 : x
  2. Step 2: Convert to fraction form
    220.25/330.38 = 124.06/x
  3. Step 3: Cross multiply
    220.25x = 330.38 × 124.06
  4. Step 4: Simplify right side
    220.25x = 40,986.94
  5. Step 5: Solve for x
    x = 40,986.94/220.25
  6. Step 6: Final answer
    x = 186.09

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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.