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Finding the Fourth Proportional to 3,272.80, 4,903.80 and 2,786.80

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Solution

The fourth proportional to 3,272.80, 4,903.80 and 2,786.80 is: 4,175.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,272.80 : 4,903.80 = 2,786.80 : x
  2. Step 2: Convert to fraction form
    3,272.80/4,903.80 = 2,786.80/x
  3. Step 3: Cross multiply
    3,272.80x = 4,903.80 × 2,786.80
  4. Step 4: Simplify right side
    3,272.80x = 13,665,909.84
  5. Step 5: Solve for x
    x = 13,665,909.84/3,272.80
  6. Step 6: Final answer
    x = 4,175.60

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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.