Home / 2,862.78-4,290.30-1,821.12

Finding the Fourth Proportional to 2,862.78, 4,290.30 and 1,821.12

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Solution

The fourth proportional to 2,862.78, 4,290.30 and 1,821.12 is: 2,729.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,862.78 : 4,290.30 = 1,821.12 : x
  2. Step 2: Convert to fraction form
    2,862.78/4,290.30 = 1,821.12/x
  3. Step 3: Cross multiply
    2,862.78x = 4,290.30 × 1,821.12
  4. Step 4: Simplify right side
    2,862.78x = 7,813,151.14
  5. Step 5: Solve for x
    x = 7,813,151.14/2,862.78
  6. Step 6: Final answer
    x = 2,729.22

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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.