Home / 2,131.33-3,197.40-670.90

Finding the Fourth Proportional to 2,131.33, 3,197.40 and 670.90

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Solution

The fourth proportional to 2,131.33, 3,197.40 and 670.90 is: 1,006.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,131.33 : 3,197.40 = 670.90 : x
  2. Step 2: Convert to fraction form
    2,131.33/3,197.40 = 670.90/x
  3. Step 3: Cross multiply
    2,131.33x = 3,197.40 × 670.90
  4. Step 4: Simplify right side
    2,131.33x = 2,145,135.66
  5. Step 5: Solve for x
    x = 2,145,135.66/2,131.33
  6. Step 6: Final answer
    x = 1,006.48

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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.