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Finding the Fourth Proportional to 2,129.55, 3,194.10 and 668.73

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Solution

The fourth proportional to 2,129.55, 3,194.10 and 668.73 is: 1,003.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.55 : 3,194.10 = 668.73 : x
  2. Step 2: Convert to fraction form
    2,129.55/3,194.10 = 668.73/x
  3. Step 3: Cross multiply
    2,129.55x = 3,194.10 × 668.73
  4. Step 4: Simplify right side
    2,129.55x = 2,135,990.49
  5. Step 5: Solve for x
    x = 2,135,990.49/2,129.55
  6. Step 6: Final answer
    x = 1,003.02

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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.