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Finding the Fourth Proportional to 803.87, 1,203.91 and 629.31

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Solution

The fourth proportional to 803.87, 1,203.91 and 629.31 is: 942.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    803.87 : 1,203.91 = 629.31 : x
  2. Step 2: Convert to fraction form
    803.87/1,203.91 = 629.31/x
  3. Step 3: Cross multiply
    803.87x = 1,203.91 × 629.31
  4. Step 4: Simplify right side
    803.87x = 757,629.46
  5. Step 5: Solve for x
    x = 757,629.46/803.87
  6. Step 6: Final answer
    x = 942.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.