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Finding the Fourth Proportional to 3,540.80, 4,886.04 and 1,968.80

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Solution

The fourth proportional to 3,540.80, 4,886.04 and 1,968.80 is: 2,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,540.80 : 4,886.04 = 1,968.80 : x
  2. Step 2: Convert to fraction form
    3,540.80/4,886.04 = 1,968.80/x
  3. Step 3: Cross multiply
    3,540.80x = 4,886.04 × 1,968.80
  4. Step 4: Simplify right side
    3,540.80x = 9,619,635.55
  5. Step 5: Solve for x
    x = 9,619,635.55/3,540.80
  6. Step 6: Final answer
    x = 2,716.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.