Home / 1,378.10-2,067.60-453.69

Finding the Fourth Proportional to 1,378.10, 2,067.60 and 453.69

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Solution

The fourth proportional to 1,378.10, 2,067.60 and 453.69 is: 680.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.10 : 2,067.60 = 453.69 : x
  2. Step 2: Convert to fraction form
    1,378.10/2,067.60 = 453.69/x
  3. Step 3: Cross multiply
    1,378.10x = 2,067.60 × 453.69
  4. Step 4: Simplify right side
    1,378.10x = 938,049.44
  5. Step 5: Solve for x
    x = 938,049.44/1,378.10
  6. Step 6: Final answer
    x = 680.69

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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.