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Finding the Fourth Proportional to 431.91, 648.06 and 226.43

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Solution

The fourth proportional to 431.91, 648.06 and 226.43 is: 339.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    431.91 : 648.06 = 226.43 : x
  2. Step 2: Convert to fraction form
    431.91/648.06 = 226.43/x
  3. Step 3: Cross multiply
    431.91x = 648.06 × 226.43
  4. Step 4: Simplify right side
    431.91x = 146,742.41
  5. Step 5: Solve for x
    x = 146,742.41/431.91
  6. Step 6: Final answer
    x = 339.75

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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.