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Finding the Fourth Proportional to 2,129.42, 3,194.14 and 742.75

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Solution

The fourth proportional to 2,129.42, 3,194.14 and 742.75 is: 1,114.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.42 : 3,194.14 = 742.75 : x
  2. Step 2: Convert to fraction form
    2,129.42/3,194.14 = 742.75/x
  3. Step 3: Cross multiply
    2,129.42x = 3,194.14 × 742.75
  4. Step 4: Simplify right side
    2,129.42x = 2,372,447.49
  5. Step 5: Solve for x
    x = 2,372,447.49/2,129.42
  6. Step 6: Final answer
    x = 1,114.13

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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.