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Finding the Fourth Proportional to 1,993.73, 2,990.59 and 694.89

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Solution

The fourth proportional to 1,993.73, 2,990.59 and 694.89 is: 1,042.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,993.73 : 2,990.59 = 694.89 : x
  2. Step 2: Convert to fraction form
    1,993.73/2,990.59 = 694.89/x
  3. Step 3: Cross multiply
    1,993.73x = 2,990.59 × 694.89
  4. Step 4: Simplify right side
    1,993.73x = 2,078,129.35
  5. Step 5: Solve for x
    x = 2,078,129.35/1,993.73
  6. Step 6: Final answer
    x = 1,042.34

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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.