Home / 3,920.25-5,880.78-1,581.06

Finding the Fourth Proportional to 3,920.25, 5,880.78 and 1,581.06

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Solution

The fourth proportional to 3,920.25, 5,880.78 and 1,581.06 is: 2,371.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.25 : 5,880.78 = 1,581.06 : x
  2. Step 2: Convert to fraction form
    3,920.25/5,880.78 = 1,581.06/x
  3. Step 3: Cross multiply
    3,920.25x = 5,880.78 × 1,581.06
  4. Step 4: Simplify right side
    3,920.25x = 9,297,866.03
  5. Step 5: Solve for x
    x = 9,297,866.03/3,920.25
  6. Step 6: Final answer
    x = 2,371.75

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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.