Home / 1,378.25-2,067.38-1,309.04

Finding the Fourth Proportional to 1,378.25, 2,067.38 and 1,309.04

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Solution

The fourth proportional to 1,378.25, 2,067.38 and 1,309.04 is: 1,963.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.25 : 2,067.38 = 1,309.04 : x
  2. Step 2: Convert to fraction form
    1,378.25/2,067.38 = 1,309.04/x
  3. Step 3: Cross multiply
    1,378.25x = 2,067.38 × 1,309.04
  4. Step 4: Simplify right side
    1,378.25x = 2,706,276.57
  5. Step 5: Solve for x
    x = 2,706,276.57/1,378.25
  6. Step 6: Final answer
    x = 1,963.56

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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.