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Finding the Fourth Proportional to 727.09, 1,003.31 and 412.27

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Solution

The fourth proportional to 727.09, 1,003.31 and 412.27 is: 568.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    727.09 : 1,003.31 = 412.27 : x
  2. Step 2: Convert to fraction form
    727.09/1,003.31 = 412.27/x
  3. Step 3: Cross multiply
    727.09x = 1,003.31 × 412.27
  4. Step 4: Simplify right side
    727.09x = 413,629.60
  5. Step 5: Solve for x
    x = 413,629.60/727.09
  6. Step 6: Final answer
    x = 568.89

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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.