Home / 2,128.44-3,192.75-667.71

Finding the Fourth Proportional to 2,128.44, 3,192.75 and 667.71

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Solution

The fourth proportional to 2,128.44, 3,192.75 and 667.71 is: 1,001.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.44 : 3,192.75 = 667.71 : x
  2. Step 2: Convert to fraction form
    2,128.44/3,192.75 = 667.71/x
  3. Step 3: Cross multiply
    2,128.44x = 3,192.75 × 667.71
  4. Step 4: Simplify right side
    2,128.44x = 2,131,831.10
  5. Step 5: Solve for x
    x = 2,131,831.10/2,128.44
  6. Step 6: Final answer
    x = 1,001.59

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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.