Home / 1,426.43-2,139.69-635.87

Finding the Fourth Proportional to 1,426.43, 2,139.69 and 635.87

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Solution

The fourth proportional to 1,426.43, 2,139.69 and 635.87 is: 953.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,426.43 : 2,139.69 = 635.87 : x
  2. Step 2: Convert to fraction form
    1,426.43/2,139.69 = 635.87/x
  3. Step 3: Cross multiply
    1,426.43x = 2,139.69 × 635.87
  4. Step 4: Simplify right side
    1,426.43x = 1,360,564.68
  5. Step 5: Solve for x
    x = 1,360,564.68/1,426.43
  6. Step 6: Final answer
    x = 953.83

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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.