Home / 2,171.26-3,257.21-938.76

Finding the Fourth Proportional to 2,171.26, 3,257.21 and 938.76

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Solution

The fourth proportional to 2,171.26, 3,257.21 and 938.76 is: 1,408.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,171.26 : 3,257.21 = 938.76 : x
  2. Step 2: Convert to fraction form
    2,171.26/3,257.21 = 938.76/x
  3. Step 3: Cross multiply
    2,171.26x = 3,257.21 × 938.76
  4. Step 4: Simplify right side
    2,171.26x = 3,057,738.46
  5. Step 5: Solve for x
    x = 3,057,738.46/2,171.26
  6. Step 6: Final answer
    x = 1,408.28

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1.5x scale

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.