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Finding the Fourth Proportional to 1,861.89, 2,792.79 and 629.27

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Solution

The fourth proportional to 1,861.89, 2,792.79 and 629.27 is: 943.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.89 : 2,792.79 = 629.27 : x
  2. Step 2: Convert to fraction form
    1,861.89/2,792.79 = 629.27/x
  3. Step 3: Cross multiply
    1,861.89x = 2,792.79 × 629.27
  4. Step 4: Simplify right side
    1,861.89x = 1,757,405.00
  5. Step 5: Solve for x
    x = 1,757,405.00/1,861.89
  6. Step 6: Final answer
    x = 943.88

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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.