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Finding the Fourth Proportional to 1,861.26, 2,791.86 and 751.16

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Solution

The fourth proportional to 1,861.26, 2,791.86 and 751.16 is: 1,126.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.26 : 2,791.86 = 751.16 : x
  2. Step 2: Convert to fraction form
    1,861.26/2,791.86 = 751.16/x
  3. Step 3: Cross multiply
    1,861.26x = 2,791.86 × 751.16
  4. Step 4: Simplify right side
    1,861.26x = 2,097,133.56
  5. Step 5: Solve for x
    x = 2,097,133.56/1,861.26
  6. Step 6: Final answer
    x = 1,126.73

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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.