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Finding the Fourth Proportional to 2,608.14, 3,912.19 and 660.34

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Solution

The fourth proportional to 2,608.14, 3,912.19 and 660.34 is: 990.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,608.14 : 3,912.19 = 660.34 : x
  2. Step 2: Convert to fraction form
    2,608.14/3,912.19 = 660.34/x
  3. Step 3: Cross multiply
    2,608.14x = 3,912.19 × 660.34
  4. Step 4: Simplify right side
    2,608.14x = 2,583,375.54
  5. Step 5: Solve for x
    x = 2,583,375.54/2,608.14
  6. Step 6: Final answer
    x = 990.50

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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.