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Finding the Fourth Proportional to 1,485.29, 2,227.94 and 791.80

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Solution

The fourth proportional to 1,485.29, 2,227.94 and 791.80 is: 1,187.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.29 : 2,227.94 = 791.80 : x
  2. Step 2: Convert to fraction form
    1,485.29/2,227.94 = 791.80/x
  3. Step 3: Cross multiply
    1,485.29x = 2,227.94 × 791.80
  4. Step 4: Simplify right side
    1,485.29x = 1,764,082.89
  5. Step 5: Solve for x
    x = 1,764,082.89/1,485.29
  6. Step 6: Final answer
    x = 1,187.70

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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.