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Finding the Fourth Proportional to 355.34, 490.33 and 200.09

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Solution

The fourth proportional to 355.34, 490.33 and 200.09 is: 276.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.34 : 490.33 = 200.09 : x
  2. Step 2: Convert to fraction form
    355.34/490.33 = 200.09/x
  3. Step 3: Cross multiply
    355.34x = 490.33 × 200.09
  4. Step 4: Simplify right side
    355.34x = 98,110.13
  5. Step 5: Solve for x
    x = 98,110.13/355.34
  6. Step 6: Final answer
    x = 276.10

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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.