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Finding the Fourth Proportional to 2,129.22, 3,194.13 and 668.49

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Solution

The fourth proportional to 2,129.22, 3,194.13 and 668.49 is: 1,002.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.22 : 3,194.13 = 668.49 : x
  2. Step 2: Convert to fraction form
    2,129.22/3,194.13 = 668.49/x
  3. Step 3: Cross multiply
    2,129.22x = 3,194.13 × 668.49
  4. Step 4: Simplify right side
    2,129.22x = 2,135,243.96
  5. Step 5: Solve for x
    x = 2,135,243.96/2,129.22
  6. Step 6: Final answer
    x = 1,002.83

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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.