Home / 2,128.82-3,193.44-667.58

Finding the Fourth Proportional to 2,128.82, 3,193.44 and 667.58

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Solution

The fourth proportional to 2,128.82, 3,193.44 and 667.58 is: 1,001.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.82 : 3,193.44 = 667.58 : x
  2. Step 2: Convert to fraction form
    2,128.82/3,193.44 = 667.58/x
  3. Step 3: Cross multiply
    2,128.82x = 3,193.44 × 667.58
  4. Step 4: Simplify right side
    2,128.82x = 2,131,876.68
  5. Step 5: Solve for x
    x = 2,131,876.68/2,128.82
  6. Step 6: Final answer
    x = 1,001.44

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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.