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Finding the Fourth Proportional to 906.27, 1,359.39 and 289.97

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Solution

The fourth proportional to 906.27, 1,359.39 and 289.97 is: 434.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    906.27 : 1,359.39 = 289.97 : x
  2. Step 2: Convert to fraction form
    906.27/1,359.39 = 289.97/x
  3. Step 3: Cross multiply
    906.27x = 1,359.39 × 289.97
  4. Step 4: Simplify right side
    906.27x = 394,175.52
  5. Step 5: Solve for x
    x = 394,175.52/906.27
  6. Step 6: Final answer
    x = 434.94

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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.