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Finding the Fourth Proportional to 146.38, 219.59 and 74.22

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Solution

The fourth proportional to 146.38, 219.59 and 74.22 is: 111.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.38 : 219.59 = 74.22 : x
  2. Step 2: Convert to fraction form
    146.38/219.59 = 74.22/x
  3. Step 3: Cross multiply
    146.38x = 219.59 × 74.22
  4. Step 4: Simplify right side
    146.38x = 16,297.97
  5. Step 5: Solve for x
    x = 16,297.97/146.38
  6. Step 6: Final answer
    x = 111.34

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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.