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Finding the Fourth Proportional to 1,791.56, 2,687.27 and 817.65

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Solution

The fourth proportional to 1,791.56, 2,687.27 and 817.65 is: 1,226.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.56 : 2,687.27 = 817.65 : x
  2. Step 2: Convert to fraction form
    1,791.56/2,687.27 = 817.65/x
  3. Step 3: Cross multiply
    1,791.56x = 2,687.27 × 817.65
  4. Step 4: Simplify right side
    1,791.56x = 2,197,242.23
  5. Step 5: Solve for x
    x = 2,197,242.23/1,791.56
  6. Step 6: Final answer
    x = 1,226.44

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1.5x scale

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.