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Finding the Fourth Proportional to 872.24, 1,203.24 and 522.80

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Solution

The fourth proportional to 872.24, 1,203.24 and 522.80 is: 721.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.24 : 1,203.24 = 522.80 : x
  2. Step 2: Convert to fraction form
    872.24/1,203.24 = 522.80/x
  3. Step 3: Cross multiply
    872.24x = 1,203.24 × 522.80
  4. Step 4: Simplify right side
    872.24x = 629,053.87
  5. Step 5: Solve for x
    x = 629,053.87/872.24
  6. Step 6: Final answer
    x = 721.19

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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.