Home / 2,739.20-4,108.80-1,961.60

Finding the Fourth Proportional to 2,739.20, 4,108.80 and 1,961.60

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Solution

The fourth proportional to 2,739.20, 4,108.80 and 1,961.60 is: 2,942.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,739.20 : 4,108.80 = 1,961.60 : x
  2. Step 2: Convert to fraction form
    2,739.20/4,108.80 = 1,961.60/x
  3. Step 3: Cross multiply
    2,739.20x = 4,108.80 × 1,961.60
  4. Step 4: Simplify right side
    2,739.20x = 8,059,822.08
  5. Step 5: Solve for x
    x = 8,059,822.08/2,739.20
  6. Step 6: Final answer
    x = 2,942.40

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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.