Home / 2,128.11-3,192.68-667.27

Finding the Fourth Proportional to 2,128.11, 3,192.68 and 667.27

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Solution

The fourth proportional to 2,128.11, 3,192.68 and 667.27 is: 1,001.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,128.11 : 3,192.68 = 667.27 : x
  2. Step 2: Convert to fraction form
    2,128.11/3,192.68 = 667.27/x
  3. Step 3: Cross multiply
    2,128.11x = 3,192.68 × 667.27
  4. Step 4: Simplify right side
    2,128.11x = 2,130,367.28
  5. Step 5: Solve for x
    x = 2,130,367.28/2,128.11
  6. Step 6: Final answer
    x = 1,001.06

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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.