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Finding the Fourth Proportional to 3,276.80, 4,940.80 and 2,867.20

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Solution

The fourth proportional to 3,276.80, 4,940.80 and 2,867.20 is: 4,323.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,276.80 : 4,940.80 = 2,867.20 : x
  2. Step 2: Convert to fraction form
    3,276.80/4,940.80 = 2,867.20/x
  3. Step 3: Cross multiply
    3,276.80x = 4,940.80 × 2,867.20
  4. Step 4: Simplify right side
    3,276.80x = 14,166,261.76
  5. Step 5: Solve for x
    x = 14,166,261.76/3,276.80
  6. Step 6: Final answer
    x = 4,323.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.