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Finding the Fourth Proportional to 2,203.88, 3,305.81 and 905.38

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Solution

The fourth proportional to 2,203.88, 3,305.81 and 905.38 is: 1,358.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,203.88 : 3,305.81 = 905.38 : x
  2. Step 2: Convert to fraction form
    2,203.88/3,305.81 = 905.38/x
  3. Step 3: Cross multiply
    2,203.88x = 3,305.81 × 905.38
  4. Step 4: Simplify right side
    2,203.88x = 2,993,008.26
  5. Step 5: Solve for x
    x = 2,993,008.26/2,203.88
  6. Step 6: Final answer
    x = 1,358.07

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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.