Home / 2,131.90-2,942.25-1,248.44

Finding the Fourth Proportional to 2,131.90, 2,942.25 and 1,248.44

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Solution

The fourth proportional to 2,131.90, 2,942.25 and 1,248.44 is: 1,722.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.90 : 2,942.25 = 1,248.44 : x
  2. Step 2: Convert to fraction form
    2,131.90/2,942.25 = 1,248.44/x
  3. Step 3: Cross multiply
    2,131.90x = 2,942.25 × 1,248.44
  4. Step 4: Simplify right side
    2,131.90x = 3,673,203.20
  5. Step 5: Solve for x
    x = 3,673,203.20/2,131.90
  6. Step 6: Final answer
    x = 1,722.97

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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.