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Finding the Fourth Proportional to 2,615.60, 3,912.60 and 2,226.80

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Solution

The fourth proportional to 2,615.60, 3,912.60 and 2,226.80 is: 3,331.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.60 : 3,912.60 = 2,226.80 : x
  2. Step 2: Convert to fraction form
    2,615.60/3,912.60 = 2,226.80/x
  3. Step 3: Cross multiply
    2,615.60x = 3,912.60 × 2,226.80
  4. Step 4: Simplify right side
    2,615.60x = 8,712,577.68
  5. Step 5: Solve for x
    x = 8,712,577.68/2,615.60
  6. Step 6: Final answer
    x = 3,331.01

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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.