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Finding the Fourth Proportional to 322.87, 484.05 and 127.92

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Solution

The fourth proportional to 322.87, 484.05 and 127.92 is: 191.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    322.87 : 484.05 = 127.92 : x
  2. Step 2: Convert to fraction form
    322.87/484.05 = 127.92/x
  3. Step 3: Cross multiply
    322.87x = 484.05 × 127.92
  4. Step 4: Simplify right side
    322.87x = 61,919.68
  5. Step 5: Solve for x
    x = 61,919.68/322.87
  6. Step 6: Final answer
    x = 191.78

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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.