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Finding the Fourth Proportional to 451.38, 677.10 and 126.75

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Solution

The fourth proportional to 451.38, 677.10 and 126.75 is: 190.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.38 : 677.10 = 126.75 : x
  2. Step 2: Convert to fraction form
    451.38/677.10 = 126.75/x
  3. Step 3: Cross multiply
    451.38x = 677.10 × 126.75
  4. Step 4: Simplify right side
    451.38x = 85,819.04
  5. Step 5: Solve for x
    x = 85,819.04/451.38
  6. Step 6: Final answer
    x = 190.13

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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.