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Finding the Fourth Proportional to 318.89, 479.07 and 226.56

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Solution

The fourth proportional to 318.89, 479.07 and 226.56 is: 340.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.89 : 479.07 = 226.56 : x
  2. Step 2: Convert to fraction form
    318.89/479.07 = 226.56/x
  3. Step 3: Cross multiply
    318.89x = 479.07 × 226.56
  4. Step 4: Simplify right side
    318.89x = 108,538.10
  5. Step 5: Solve for x
    x = 108,538.10/318.89
  6. Step 6: Final answer
    x = 340.37

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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.