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Finding the Fourth Proportional to 450.80, 676.15 and 126.20

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Solution

The fourth proportional to 450.80, 676.15 and 126.20 is: 189.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.80 : 676.15 = 126.20 : x
  2. Step 2: Convert to fraction form
    450.80/676.15 = 126.20/x
  3. Step 3: Cross multiply
    450.80x = 676.15 × 126.20
  4. Step 4: Simplify right side
    450.80x = 85,326.43
  5. Step 5: Solve for x
    x = 85,326.43/450.80
  6. Step 6: Final answer
    x = 189.28

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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.