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Finding the Fourth Proportional to 1,644, 2,268.87 and 945.51

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Solution

The fourth proportional to 1,644, 2,268.87 and 945.51 is: 1,304.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,644 : 2,268.87 = 945.51 : x
  2. Step 2: Convert to fraction form
    1,644/2,268.87 = 945.51/x
  3. Step 3: Cross multiply
    1,644x = 2,268.87 × 945.51
  4. Step 4: Simplify right side
    1,644x = 2,145,239.27
  5. Step 5: Solve for x
    x = 2,145,239.27/1,644
  6. Step 6: Final answer
    x = 1,304.89

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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.