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Finding the Fourth Proportional to 872.04, 1,202.31 and 662.43

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Solution

The fourth proportional to 872.04, 1,202.31 and 662.43 is: 913.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    872.04 : 1,202.31 = 662.43 : x
  2. Step 2: Convert to fraction form
    872.04/1,202.31 = 662.43/x
  3. Step 3: Cross multiply
    872.04x = 1,202.31 × 662.43
  4. Step 4: Simplify right side
    872.04x = 796,446.21
  5. Step 5: Solve for x
    x = 796,446.21/872.04
  6. Step 6: Final answer
    x = 913.31

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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.