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Finding the Fourth Proportional to 2,608.60, 3,912.90 and 2,511.40

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Solution

The fourth proportional to 2,608.60, 3,912.90 and 2,511.40 is: 3,767.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,608.60 : 3,912.90 = 2,511.40 : x
  2. Step 2: Convert to fraction form
    2,608.60/3,912.90 = 2,511.40/x
  3. Step 3: Cross multiply
    2,608.60x = 3,912.90 × 2,511.40
  4. Step 4: Simplify right side
    2,608.60x = 9,826,857.06
  5. Step 5: Solve for x
    x = 9,826,857.06/2,608.60
  6. Step 6: Final answer
    x = 3,767.10

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Similar ratio
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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.