Home / 2,128.43-3,192.44-667.59

Finding the Fourth Proportional to 2,128.43, 3,192.44 and 667.59

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Solution

The fourth proportional to 2,128.43, 3,192.44 and 667.59 is: 1,001.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.43 : 3,192.44 = 667.59 : x
  2. Step 2: Convert to fraction form
    2,128.43/3,192.44 = 667.59/x
  3. Step 3: Cross multiply
    2,128.43x = 3,192.44 × 667.59
  4. Step 4: Simplify right side
    2,128.43x = 2,131,237.68
  5. Step 5: Solve for x
    x = 2,131,237.68/2,128.43
  6. Step 6: Final answer
    x = 1,001.32

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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.