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Finding the Fourth Proportional to 834.28, 1,251.42 and 450.28

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Solution

The fourth proportional to 834.28, 1,251.42 and 450.28 is: 675.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.28 : 1,251.42 = 450.28 : x
  2. Step 2: Convert to fraction form
    834.28/1,251.42 = 450.28/x
  3. Step 3: Cross multiply
    834.28x = 1,251.42 × 450.28
  4. Step 4: Simplify right side
    834.28x = 563,489.40
  5. Step 5: Solve for x
    x = 563,489.40/834.28
  6. Step 6: Final answer
    x = 675.42

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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.