Home / 2,142.22-2,956.11-1,257.90

Finding the Fourth Proportional to 2,142.22, 2,956.11 and 1,257.90

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Solution

The fourth proportional to 2,142.22, 2,956.11 and 1,257.90 is: 1,735.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142.22 : 2,956.11 = 1,257.90 : x
  2. Step 2: Convert to fraction form
    2,142.22/2,956.11 = 1,257.90/x
  3. Step 3: Cross multiply
    2,142.22x = 2,956.11 × 1,257.90
  4. Step 4: Simplify right side
    2,142.22x = 3,718,486.05
  5. Step 5: Solve for x
    x = 3,718,486.05/2,142.22
  6. Step 6: Final answer
    x = 1,735.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.