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Finding the Fourth Proportional to 2,611.60, 3,906.60 and 2,222.80

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Solution

The fourth proportional to 2,611.60, 3,906.60 and 2,222.80 is: 3,325.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,611.60 : 3,906.60 = 2,222.80 : x
  2. Step 2: Convert to fraction form
    2,611.60/3,906.60 = 2,222.80/x
  3. Step 3: Cross multiply
    2,611.60x = 3,906.60 × 2,222.80
  4. Step 4: Simplify right side
    2,611.60x = 8,683,590.48
  5. Step 5: Solve for x
    x = 8,683,590.48/2,611.60
  6. Step 6: Final answer
    x = 3,325.01

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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.