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Finding the Fourth Proportional to 355.18, 490.14 and 199.96

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Solution

The fourth proportional to 355.18, 490.14 and 199.96 is: 275.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.18 : 490.14 = 199.96 : x
  2. Step 2: Convert to fraction form
    355.18/490.14 = 199.96/x
  3. Step 3: Cross multiply
    355.18x = 490.14 × 199.96
  4. Step 4: Simplify right side
    355.18x = 98,008.39
  5. Step 5: Solve for x
    x = 98,008.39/355.18
  6. Step 6: Final answer
    x = 275.94

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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.