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Finding the Fourth Proportional to 2,640.44, 3,961.20 and 908.84

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Solution

The fourth proportional to 2,640.44, 3,961.20 and 908.84 is: 1,363.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,640.44 : 3,961.20 = 908.84 : x
  2. Step 2: Convert to fraction form
    2,640.44/3,961.20 = 908.84/x
  3. Step 3: Cross multiply
    2,640.44x = 3,961.20 × 908.84
  4. Step 4: Simplify right side
    2,640.44x = 3,600,097.01
  5. Step 5: Solve for x
    x = 3,600,097.01/2,640.44
  6. Step 6: Final answer
    x = 1,363.45

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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.