Home / 1,286.62-1,776.33-867.04

Finding the Fourth Proportional to 1,286.62, 1,776.33 and 867.04

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Solution

The fourth proportional to 1,286.62, 1,776.33 and 867.04 is: 1,197.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,286.62 : 1,776.33 = 867.04 : x
  2. Step 2: Convert to fraction form
    1,286.62/1,776.33 = 867.04/x
  3. Step 3: Cross multiply
    1,286.62x = 1,776.33 × 867.04
  4. Step 4: Simplify right side
    1,286.62x = 1,540,144.72
  5. Step 5: Solve for x
    x = 1,540,144.72/1,286.62
  6. Step 6: Final answer
    x = 1,197.05

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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.