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Finding the Fourth Proportional to 450.75, 676.11 and 126.12

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Solution

The fourth proportional to 450.75, 676.11 and 126.12 is: 189.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.75 : 676.11 = 126.12 : x
  2. Step 2: Convert to fraction form
    450.75/676.11 = 126.12/x
  3. Step 3: Cross multiply
    450.75x = 676.11 × 126.12
  4. Step 4: Simplify right side
    450.75x = 85,274.00
  5. Step 5: Solve for x
    x = 85,274.00/450.75
  6. Step 6: Final answer
    x = 189.18

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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.