Home / 1,426.97-2,140.43-453.05

Finding the Fourth Proportional to 1,426.97, 2,140.43 and 453.05

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Solution

The fourth proportional to 1,426.97, 2,140.43 and 453.05 is: 679.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.97 : 2,140.43 = 453.05 : x
  2. Step 2: Convert to fraction form
    1,426.97/2,140.43 = 453.05/x
  3. Step 3: Cross multiply
    1,426.97x = 2,140.43 × 453.05
  4. Step 4: Simplify right side
    1,426.97x = 969,724.90
  5. Step 5: Solve for x
    x = 969,724.90/1,426.97
  6. Step 6: Final answer
    x = 679.57

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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.