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Finding the Fourth Proportional to 1,086.11, 1,629.82 and 997.89

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Solution

The fourth proportional to 1,086.11, 1,629.82 and 997.89 is: 1,497.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,086.11 : 1,629.82 = 997.89 : x
  2. Step 2: Convert to fraction form
    1,086.11/1,629.82 = 997.89/x
  3. Step 3: Cross multiply
    1,086.11x = 1,629.82 × 997.89
  4. Step 4: Simplify right side
    1,086.11x = 1,626,381.08
  5. Step 5: Solve for x
    x = 1,626,381.08/1,086.11
  6. Step 6: Final answer
    x = 1,497.44

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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.