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Finding the Fourth Proportional to 226.40, 311.92 and 148.64

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Solution

The fourth proportional to 226.40, 311.92 and 148.64 is: 204.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.40 : 311.92 = 148.64 : x
  2. Step 2: Convert to fraction form
    226.40/311.92 = 148.64/x
  3. Step 3: Cross multiply
    226.40x = 311.92 × 148.64
  4. Step 4: Simplify right side
    226.40x = 46,361.86
  5. Step 5: Solve for x
    x = 46,361.86/226.40
  6. Step 6: Final answer
    x = 204.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.