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Finding the Fourth Proportional to 2,171.81, 3,258.33 and 854.75

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Solution

The fourth proportional to 2,171.81, 3,258.33 and 854.75 is: 1,282.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.81 : 3,258.33 = 854.75 : x
  2. Step 2: Convert to fraction form
    2,171.81/3,258.33 = 854.75/x
  3. Step 3: Cross multiply
    2,171.81x = 3,258.33 × 854.75
  4. Step 4: Simplify right side
    2,171.81x = 2,785,067.17
  5. Step 5: Solve for x
    x = 2,785,067.17/2,171.81
  6. Step 6: Final answer
    x = 1,282.37

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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.