Home / 2,067.51-3,102.81-1,288.65

Finding the Fourth Proportional to 2,067.51, 3,102.81 and 1,288.65

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Solution

The fourth proportional to 2,067.51, 3,102.81 and 1,288.65 is: 1,933.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,067.51 : 3,102.81 = 1,288.65 : x
  2. Step 2: Convert to fraction form
    2,067.51/3,102.81 = 1,288.65/x
  3. Step 3: Cross multiply
    2,067.51x = 3,102.81 × 1,288.65
  4. Step 4: Simplify right side
    2,067.51x = 3,998,436.11
  5. Step 5: Solve for x
    x = 3,998,436.11/2,067.51
  6. Step 6: Final answer
    x = 1,933.94

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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.