Home / 2,790.40-4,185.60-2,747.20

Finding the Fourth Proportional to 2,790.40, 4,185.60 and 2,747.20

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Solution

The fourth proportional to 2,790.40, 4,185.60 and 2,747.20 is: 4,120.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,790.40 : 4,185.60 = 2,747.20 : x
  2. Step 2: Convert to fraction form
    2,790.40/4,185.60 = 2,747.20/x
  3. Step 3: Cross multiply
    2,790.40x = 4,185.60 × 2,747.20
  4. Step 4: Simplify right side
    2,790.40x = 11,498,680.32
  5. Step 5: Solve for x
    x = 11,498,680.32/2,790.40
  6. Step 6: Final answer
    x = 4,120.80

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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.