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Finding the Fourth Proportional to 226.91, 340.40 and 72.79

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Solution

The fourth proportional to 226.91, 340.40 and 72.79 is: 109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.91 : 340.40 = 72.79 : x
  2. Step 2: Convert to fraction form
    226.91/340.40 = 72.79/x
  3. Step 3: Cross multiply
    226.91x = 340.40 × 72.79
  4. Step 4: Simplify right side
    226.91x = 24,777.72
  5. Step 5: Solve for x
    x = 24,777.72/226.91
  6. Step 6: Final answer
    x = 109.20

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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.