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Finding the Fourth Proportional to 355.14, 490.35 and 262.02

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Solution

The fourth proportional to 355.14, 490.35 and 262.02 is: 361.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.14 : 490.35 = 262.02 : x
  2. Step 2: Convert to fraction form
    355.14/490.35 = 262.02/x
  3. Step 3: Cross multiply
    355.14x = 490.35 × 262.02
  4. Step 4: Simplify right side
    355.14x = 128,481.51
  5. Step 5: Solve for x
    x = 128,481.51/355.14
  6. Step 6: Final answer
    x = 361.78

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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.