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Finding the Fourth Proportional to 2,906.60, 4,008.12 and 2,276

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Solution

The fourth proportional to 2,906.60, 4,008.12 and 2,276 is: 3,138.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,906.60 : 4,008.12 = 2,276 : x
  2. Step 2: Convert to fraction form
    2,906.60/4,008.12 = 2,276/x
  3. Step 3: Cross multiply
    2,906.60x = 4,008.12 × 2,276
  4. Step 4: Simplify right side
    2,906.60x = 9,122,481.12
  5. Step 5: Solve for x
    x = 9,122,481.12/2,906.60
  6. Step 6: Final answer
    x = 3,138.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.