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Finding the Fourth Proportional to 1,245.97, 1,869.03 and 697.73

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Solution

The fourth proportional to 1,245.97, 1,869.03 and 697.73 is: 1,046.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,245.97 : 1,869.03 = 697.73 : x
  2. Step 2: Convert to fraction form
    1,245.97/1,869.03 = 697.73/x
  3. Step 3: Cross multiply
    1,245.97x = 1,869.03 × 697.73
  4. Step 4: Simplify right side
    1,245.97x = 1,304,082.97
  5. Step 5: Solve for x
    x = 1,304,082.97/1,245.97
  6. Step 6: Final answer
    x = 1,046.64

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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.