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Finding the Fourth Proportional to 3,990.97, 5,456.27 and 3,837.88

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Solution

The fourth proportional to 3,990.97, 5,456.27 and 3,837.88 is: 5,246.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,990.97 : 5,456.27 = 3,837.88 : x
  2. Step 2: Convert to fraction form
    3,990.97/5,456.27 = 3,837.88/x
  3. Step 3: Cross multiply
    3,990.97x = 5,456.27 × 3,837.88
  4. Step 4: Simplify right side
    3,990.97x = 20,940,509.51
  5. Step 5: Solve for x
    x = 20,940,509.51/3,990.97
  6. Step 6: Final answer
    x = 5,246.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.