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Finding the Fourth Proportional to 146.79, 221.26 and 131.91

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Solution

The fourth proportional to 146.79, 221.26 and 131.91 is: 198.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    146.79 : 221.26 = 131.91 : x
  2. Step 2: Convert to fraction form
    146.79/221.26 = 131.91/x
  3. Step 3: Cross multiply
    146.79x = 221.26 × 131.91
  4. Step 4: Simplify right side
    146.79x = 29,186.41
  5. Step 5: Solve for x
    x = 29,186.41/146.79
  6. Step 6: Final answer
    x = 198.83

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.