Home / 2,806.90-3,869.47-1,964.99

Finding the Fourth Proportional to 2,806.90, 3,869.47 and 1,964.99

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Solution

The fourth proportional to 2,806.90, 3,869.47 and 1,964.99 is: 2,708.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,806.90 : 3,869.47 = 1,964.99 : x
  2. Step 2: Convert to fraction form
    2,806.90/3,869.47 = 1,964.99/x
  3. Step 3: Cross multiply
    2,806.90x = 3,869.47 × 1,964.99
  4. Step 4: Simplify right side
    2,806.90x = 7,603,469.86
  5. Step 5: Solve for x
    x = 7,603,469.86/2,806.90
  6. Step 6: Final answer
    x = 2,708.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.