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Finding the Fourth Proportional to 1,791.62, 2,687.39 and 493.10

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Solution

The fourth proportional to 1,791.62, 2,687.39 and 493.10 is: 739.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,791.62 : 2,687.39 = 493.10 : x
  2. Step 2: Convert to fraction form
    1,791.62/2,687.39 = 493.10/x
  3. Step 3: Cross multiply
    1,791.62x = 2,687.39 × 493.10
  4. Step 4: Simplify right side
    1,791.62x = 1,325,152.01
  5. Step 5: Solve for x
    x = 1,325,152.01/1,791.62
  6. Step 6: Final answer
    x = 739.64

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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.