Home / 3,987.27-5,980.97-1,213.81

Finding the Fourth Proportional to 3,987.27, 5,980.97 and 1,213.81

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Solution

The fourth proportional to 3,987.27, 5,980.97 and 1,213.81 is: 1,820.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.27 : 5,980.97 = 1,213.81 : x
  2. Step 2: Convert to fraction form
    3,987.27/5,980.97 = 1,213.81/x
  3. Step 3: Cross multiply
    3,987.27x = 5,980.97 × 1,213.81
  4. Step 4: Simplify right side
    3,987.27x = 7,259,749.28
  5. Step 5: Solve for x
    x = 7,259,749.28/3,987.27
  6. Step 6: Final answer
    x = 1,820.73

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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.