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Finding the Fourth Proportional to 451.59, 677.28 and 126.95

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Solution

The fourth proportional to 451.59, 677.28 and 126.95 is: 190.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.59 : 677.28 = 126.95 : x
  2. Step 2: Convert to fraction form
    451.59/677.28 = 126.95/x
  3. Step 3: Cross multiply
    451.59x = 677.28 × 126.95
  4. Step 4: Simplify right side
    451.59x = 85,977.31
  5. Step 5: Solve for x
    x = 85,977.31/451.59
  6. Step 6: Final answer
    x = 190.39

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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.