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Finding the Fourth Proportional to 1,990.92, 2,747.07 and 1,693.38

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Solution

The fourth proportional to 1,990.92, 2,747.07 and 1,693.38 is: 2,336.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,990.92 : 2,747.07 = 1,693.38 : x
  2. Step 2: Convert to fraction form
    1,990.92/2,747.07 = 1,693.38/x
  3. Step 3: Cross multiply
    1,990.92x = 2,747.07 × 1,693.38
  4. Step 4: Simplify right side
    1,990.92x = 4,651,833.40
  5. Step 5: Solve for x
    x = 4,651,833.40/1,990.92
  6. Step 6: Final answer
    x = 2,336.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.