Home / 1,992.21-2,750.99-1,247.43

Finding the Fourth Proportional to 1,992.21, 2,750.99 and 1,247.43

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Solution

The fourth proportional to 1,992.21, 2,750.99 and 1,247.43 is: 1,722.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992.21 : 2,750.99 = 1,247.43 : x
  2. Step 2: Convert to fraction form
    1,992.21/2,750.99 = 1,247.43/x
  3. Step 3: Cross multiply
    1,992.21x = 2,750.99 × 1,247.43
  4. Step 4: Simplify right side
    1,992.21x = 3,431,667.46
  5. Step 5: Solve for x
    x = 3,431,667.46/1,992.21
  6. Step 6: Final answer
    x = 1,722.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.