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Finding the Fourth Proportional to 226.79, 340.26 and 72.74

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Solution

The fourth proportional to 226.79, 340.26 and 72.74 is: 109.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    226.79 : 340.26 = 72.74 : x
  2. Step 2: Convert to fraction form
    226.79/340.26 = 72.74/x
  3. Step 3: Cross multiply
    226.79x = 340.26 × 72.74
  4. Step 4: Simplify right side
    226.79x = 24,748.81
  5. Step 5: Solve for x
    x = 24,748.81/226.79
  6. Step 6: Final answer
    x = 109.13

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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.