Home / 2,820.80-4,226.40-2,331.20

Finding the Fourth Proportional to 2,820.80, 4,226.40 and 2,331.20

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Solution

The fourth proportional to 2,820.80, 4,226.40 and 2,331.20 is: 3,492.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,820.80 : 4,226.40 = 2,331.20 : x
  2. Step 2: Convert to fraction form
    2,820.80/4,226.40 = 2,331.20/x
  3. Step 3: Cross multiply
    2,820.80x = 4,226.40 × 2,331.20
  4. Step 4: Simplify right side
    2,820.80x = 9,852,583.68
  5. Step 5: Solve for x
    x = 9,852,583.68/2,820.80
  6. Step 6: Final answer
    x = 3,492.83

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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.