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Finding the Fourth Proportional to 451.05, 676.17 and 234.78

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Solution

The fourth proportional to 451.05, 676.17 and 234.78 is: 351.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.05 : 676.17 = 234.78 : x
  2. Step 2: Convert to fraction form
    451.05/676.17 = 234.78/x
  3. Step 3: Cross multiply
    451.05x = 676.17 × 234.78
  4. Step 4: Simplify right side
    451.05x = 158,751.19
  5. Step 5: Solve for x
    x = 158,751.19/451.05
  6. Step 6: Final answer
    x = 351.96

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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.