Home / 1,387.28-2,067.49-1,375.76

Finding the Fourth Proportional to 1,387.28, 2,067.49 and 1,375.76

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Solution

The fourth proportional to 1,387.28, 2,067.49 and 1,375.76 is: 2,050.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387.28 : 2,067.49 = 1,375.76 : x
  2. Step 2: Convert to fraction form
    1,387.28/2,067.49 = 1,375.76/x
  3. Step 3: Cross multiply
    1,387.28x = 2,067.49 × 1,375.76
  4. Step 4: Simplify right side
    1,387.28x = 2,844,370.04
  5. Step 5: Solve for x
    x = 2,844,370.04/1,387.28
  6. Step 6: Final answer
    x = 2,050.32

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.