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Finding the Fourth Proportional to 905.68, 1,251.88 and 674.96

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Solution

The fourth proportional to 905.68, 1,251.88 and 674.96 is: 932.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    905.68 : 1,251.88 = 674.96 : x
  2. Step 2: Convert to fraction form
    905.68/1,251.88 = 674.96/x
  3. Step 3: Cross multiply
    905.68x = 1,251.88 × 674.96
  4. Step 4: Simplify right side
    905.68x = 844,968.92
  5. Step 5: Solve for x
    x = 844,968.92/905.68
  6. Step 6: Final answer
    x = 932.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.