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Finding the Fourth Proportional to 418.62, 629.28 and 236.36

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Solution

The fourth proportional to 418.62, 629.28 and 236.36 is: 355.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.62 : 629.28 = 236.36 : x
  2. Step 2: Convert to fraction form
    418.62/629.28 = 236.36/x
  3. Step 3: Cross multiply
    418.62x = 629.28 × 236.36
  4. Step 4: Simplify right side
    418.62x = 148,736.62
  5. Step 5: Solve for x
    x = 148,736.62/418.62
  6. Step 6: Final answer
    x = 355.30

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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.