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Finding the Fourth Proportional to 872.36, 1,203.49 and 523.05

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Solution

The fourth proportional to 872.36, 1,203.49 and 523.05 is: 721.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.36 : 1,203.49 = 523.05 : x
  2. Step 2: Convert to fraction form
    872.36/1,203.49 = 523.05/x
  3. Step 3: Cross multiply
    872.36x = 1,203.49 × 523.05
  4. Step 4: Simplify right side
    872.36x = 629,485.44
  5. Step 5: Solve for x
    x = 629,485.44/872.36
  6. Step 6: Final answer
    x = 721.59

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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.