Home / 2,380.26-3,570.60-820.20

Finding the Fourth Proportional to 2,380.26, 3,570.60 and 820.20

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Solution

The fourth proportional to 2,380.26, 3,570.60 and 820.20 is: 1,230.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,380.26 : 3,570.60 = 820.20 : x
  2. Step 2: Convert to fraction form
    2,380.26/3,570.60 = 820.20/x
  3. Step 3: Cross multiply
    2,380.26x = 3,570.60 × 820.20
  4. Step 4: Simplify right side
    2,380.26x = 2,928,606.12
  5. Step 5: Solve for x
    x = 2,928,606.12/2,380.26
  6. Step 6: Final answer
    x = 1,230.37

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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.