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Finding the Fourth Proportional to 355.98, 490.73 and 245.27

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Solution

The fourth proportional to 355.98, 490.73 and 245.27 is: 338.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    355.98 : 490.73 = 245.27 : x
  2. Step 2: Convert to fraction form
    355.98/490.73 = 245.27/x
  3. Step 3: Cross multiply
    355.98x = 490.73 × 245.27
  4. Step 4: Simplify right side
    355.98x = 120,357.67
  5. Step 5: Solve for x
    x = 120,357.67/355.98
  6. Step 6: Final answer
    x = 338.10

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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.