Home / 2,720.22-4,080.87-990.06

Finding the Fourth Proportional to 2,720.22, 4,080.87 and 990.06

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Solution

The fourth proportional to 2,720.22, 4,080.87 and 990.06 is: 1,485.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,720.22 : 4,080.87 = 990.06 : x
  2. Step 2: Convert to fraction form
    2,720.22/4,080.87 = 990.06/x
  3. Step 3: Cross multiply
    2,720.22x = 4,080.87 × 990.06
  4. Step 4: Simplify right side
    2,720.22x = 4,040,306.15
  5. Step 5: Solve for x
    x = 4,040,306.15/2,720.22
  6. Step 6: Final answer
    x = 1,485.29

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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.