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Finding the Fourth Proportional to 834.08, 1,251.12 and 256.96

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Solution

The fourth proportional to 834.08, 1,251.12 and 256.96 is: 385.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.08 : 1,251.12 = 256.96 : x
  2. Step 2: Convert to fraction form
    834.08/1,251.12 = 256.96/x
  3. Step 3: Cross multiply
    834.08x = 1,251.12 × 256.96
  4. Step 4: Simplify right side
    834.08x = 321,487.80
  5. Step 5: Solve for x
    x = 321,487.80/834.08
  6. Step 6: Final answer
    x = 385.44

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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.