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Finding the Fourth Proportional to 228.31, 340.99 and 226.72

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Solution

The fourth proportional to 228.31, 340.99 and 226.72 is: 338.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    228.31 : 340.99 = 226.72 : x
  2. Step 2: Convert to fraction form
    228.31/340.99 = 226.72/x
  3. Step 3: Cross multiply
    228.31x = 340.99 × 226.72
  4. Step 4: Simplify right side
    228.31x = 77,309.25
  5. Step 5: Solve for x
    x = 77,309.25/228.31
  6. Step 6: Final answer
    x = 338.62

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.