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Finding the Fourth Proportional to 451.69, 677.75 and 191.75

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Solution

The fourth proportional to 451.69, 677.75 and 191.75 is: 287.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    451.69 : 677.75 = 191.75 : x
  2. Step 2: Convert to fraction form
    451.69/677.75 = 191.75/x
  3. Step 3: Cross multiply
    451.69x = 677.75 × 191.75
  4. Step 4: Simplify right side
    451.69x = 129,956.76
  5. Step 5: Solve for x
    x = 129,956.76/451.69
  6. Step 6: Final answer
    x = 287.71

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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.