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Finding the Fourth Proportional to 355.25, 490.11 and 262.22

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Solution

The fourth proportional to 355.25, 490.11 and 262.22 is: 361.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.25 : 490.11 = 262.22 : x
  2. Step 2: Convert to fraction form
    355.25/490.11 = 262.22/x
  3. Step 3: Cross multiply
    355.25x = 490.11 × 262.22
  4. Step 4: Simplify right side
    355.25x = 128,516.64
  5. Step 5: Solve for x
    x = 128,516.64/355.25
  6. Step 6: Final answer
    x = 361.76

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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.