Home / 3,919.20-5,880.88-1,971.36

Finding the Fourth Proportional to 3,919.20, 5,880.88 and 1,971.36

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Solution

The fourth proportional to 3,919.20, 5,880.88 and 1,971.36 is: 2,958.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.20 : 5,880.88 = 1,971.36 : x
  2. Step 2: Convert to fraction form
    3,919.20/5,880.88 = 1,971.36/x
  3. Step 3: Cross multiply
    3,919.20x = 5,880.88 × 1,971.36
  4. Step 4: Simplify right side
    3,919.20x = 11,593,331.60
  5. Step 5: Solve for x
    x = 11,593,331.60/3,919.20
  6. Step 6: Final answer
    x = 2,958.09

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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.