Home / 1,426.26-2,138.61-722.82

Finding the Fourth Proportional to 1,426.26, 2,138.61 and 722.82

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Solution

The fourth proportional to 1,426.26, 2,138.61 and 722.82 is: 1,083.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.26 : 2,138.61 = 722.82 : x
  2. Step 2: Convert to fraction form
    1,426.26/2,138.61 = 722.82/x
  3. Step 3: Cross multiply
    1,426.26x = 2,138.61 × 722.82
  4. Step 4: Simplify right side
    1,426.26x = 1,545,830.08
  5. Step 5: Solve for x
    x = 1,545,830.08/1,426.26
  6. Step 6: Final answer
    x = 1,083.83

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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.