Home / 1,378.11-2,067.46-453.63

Finding the Fourth Proportional to 1,378.11, 2,067.46 and 453.63

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Solution

The fourth proportional to 1,378.11, 2,067.46 and 453.63 is: 680.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.11 : 2,067.46 = 453.63 : x
  2. Step 2: Convert to fraction form
    1,378.11/2,067.46 = 453.63/x
  3. Step 3: Cross multiply
    1,378.11x = 2,067.46 × 453.63
  4. Step 4: Simplify right side
    1,378.11x = 937,851.54
  5. Step 5: Solve for x
    x = 937,851.54/1,378.11
  6. Step 6: Final answer
    x = 680.54

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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.