Home / 2,131.89-3,197.80-1,260.44

Finding the Fourth Proportional to 2,131.89, 3,197.80 and 1,260.44

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Solution

The fourth proportional to 2,131.89, 3,197.80 and 1,260.44 is: 1,890.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.89 : 3,197.80 = 1,260.44 : x
  2. Step 2: Convert to fraction form
    2,131.89/3,197.80 = 1,260.44/x
  3. Step 3: Cross multiply
    2,131.89x = 3,197.80 × 1,260.44
  4. Step 4: Simplify right side
    2,131.89x = 4,030,627.16
  5. Step 5: Solve for x
    x = 4,030,627.16/2,131.89
  6. Step 6: Final answer
    x = 1,890.63

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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.