Home / 2,717.85-4,077.99-1,991.28

Finding the Fourth Proportional to 2,717.85, 4,077.99 and 1,991.28

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Solution

The fourth proportional to 2,717.85, 4,077.99 and 1,991.28 is: 2,987.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,717.85 : 4,077.99 = 1,991.28 : x
  2. Step 2: Convert to fraction form
    2,717.85/4,077.99 = 1,991.28/x
  3. Step 3: Cross multiply
    2,717.85x = 4,077.99 × 1,991.28
  4. Step 4: Simplify right side
    2,717.85x = 8,120,419.93
  5. Step 5: Solve for x
    x = 8,120,419.93/2,717.85
  6. Step 6: Final answer
    x = 2,987.81

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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.