Home / 2,129.44-3,195.62-742.78

Finding the Fourth Proportional to 2,129.44, 3,195.62 and 742.78

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Solution

The fourth proportional to 2,129.44, 3,195.62 and 742.78 is: 1,114.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.44 : 3,195.62 = 742.78 : x
  2. Step 2: Convert to fraction form
    2,129.44/3,195.62 = 742.78/x
  3. Step 3: Cross multiply
    2,129.44x = 3,195.62 × 742.78
  4. Step 4: Simplify right side
    2,129.44x = 2,373,642.62
  5. Step 5: Solve for x
    x = 2,373,642.62/2,129.44
  6. Step 6: Final answer
    x = 1,114.68

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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.