Home / 1,861.25-2,791.26-628.43

Finding the Fourth Proportional to 1,861.25, 2,791.26 and 628.43

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Solution

The fourth proportional to 1,861.25, 2,791.26 and 628.43 is: 942.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.25 : 2,791.26 = 628.43 : x
  2. Step 2: Convert to fraction form
    1,861.25/2,791.26 = 628.43/x
  3. Step 3: Cross multiply
    1,861.25x = 2,791.26 × 628.43
  4. Step 4: Simplify right side
    1,861.25x = 1,754,097.57
  5. Step 5: Solve for x
    x = 1,754,097.57/1,861.25
  6. Step 6: Final answer
    x = 942.43

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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.