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Finding the Fourth Proportional to 2,832.80, 4,255.60 and 1,968.80

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Solution

The fourth proportional to 2,832.80, 4,255.60 and 1,968.80 is: 2,957.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,832.80 : 4,255.60 = 1,968.80 : x
  2. Step 2: Convert to fraction form
    2,832.80/4,255.60 = 1,968.80/x
  3. Step 3: Cross multiply
    2,832.80x = 4,255.60 × 1,968.80
  4. Step 4: Simplify right side
    2,832.80x = 8,378,425.28
  5. Step 5: Solve for x
    x = 8,378,425.28/2,832.80
  6. Step 6: Final answer
    x = 2,957.65

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1.5x scale

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.