Home / 1,378.16-2,067.06-453.56

Finding the Fourth Proportional to 1,378.16, 2,067.06 and 453.56

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Solution

The fourth proportional to 1,378.16, 2,067.06 and 453.56 is: 680.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.16 : 2,067.06 = 453.56 : x
  2. Step 2: Convert to fraction form
    1,378.16/2,067.06 = 453.56/x
  3. Step 3: Cross multiply
    1,378.16x = 2,067.06 × 453.56
  4. Step 4: Simplify right side
    1,378.16x = 937,535.73
  5. Step 5: Solve for x
    x = 937,535.73/1,378.16
  6. Step 6: Final answer
    x = 680.28

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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.