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Finding the Fourth Proportional to 834.44, 1,252.42 and 423.86

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Solution

The fourth proportional to 834.44, 1,252.42 and 423.86 is: 636.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.44 : 1,252.42 = 423.86 : x
  2. Step 2: Convert to fraction form
    834.44/1,252.42 = 423.86/x
  3. Step 3: Cross multiply
    834.44x = 1,252.42 × 423.86
  4. Step 4: Simplify right side
    834.44x = 530,843.42
  5. Step 5: Solve for x
    x = 530,843.42/834.44
  6. Step 6: Final answer
    x = 636.17

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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.