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Finding the Fourth Proportional to 1,286.91, 1,930.26 and 464.97

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Solution

The fourth proportional to 1,286.91, 1,930.26 and 464.97 is: 697.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.91 : 1,930.26 = 464.97 : x
  2. Step 2: Convert to fraction form
    1,286.91/1,930.26 = 464.97/x
  3. Step 3: Cross multiply
    1,286.91x = 1,930.26 × 464.97
  4. Step 4: Simplify right side
    1,286.91x = 897,512.99
  5. Step 5: Solve for x
    x = 897,512.99/1,286.91
  6. Step 6: Final answer
    x = 697.42

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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.