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Finding the Fourth Proportional to 3,274.80, 4,906.80 and 2,788.80

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Solution

The fourth proportional to 3,274.80, 4,906.80 and 2,788.80 is: 4,178.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,274.80 : 4,906.80 = 2,788.80 : x
  2. Step 2: Convert to fraction form
    3,274.80/4,906.80 = 2,788.80/x
  3. Step 3: Cross multiply
    3,274.80x = 4,906.80 × 2,788.80
  4. Step 4: Simplify right side
    3,274.80x = 13,684,083.84
  5. Step 5: Solve for x
    x = 13,684,083.84/3,274.80
  6. Step 6: Final answer
    x = 4,178.60

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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.