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Finding the Fourth Proportional to 1,644, 2,268.72 and 908

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Solution

The fourth proportional to 1,644, 2,268.72 and 908 is: 1,253.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644 : 2,268.72 = 908 : x
  2. Step 2: Convert to fraction form
    1,644/2,268.72 = 908/x
  3. Step 3: Cross multiply
    1,644x = 2,268.72 × 908
  4. Step 4: Simplify right side
    1,644x = 2,059,997.76
  5. Step 5: Solve for x
    x = 2,059,997.76/1,644
  6. Step 6: Final answer
    x = 1,253.04

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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.