Home / 3,987.01-5,981.38-1,213.61

Finding the Fourth Proportional to 3,987.01, 5,981.38 and 1,213.61

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Solution

The fourth proportional to 3,987.01, 5,981.38 and 1,213.61 is: 1,820.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.01 : 5,981.38 = 1,213.61 : x
  2. Step 2: Convert to fraction form
    3,987.01/5,981.38 = 1,213.61/x
  3. Step 3: Cross multiply
    3,987.01x = 5,981.38 × 1,213.61
  4. Step 4: Simplify right side
    3,987.01x = 7,259,049.62
  5. Step 5: Solve for x
    x = 7,259,049.62/3,987.01
  6. Step 6: Final answer
    x = 1,820.68

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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.