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Finding the Fourth Proportional to 327.78, 451.98 and 253.98

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Solution

The fourth proportional to 327.78, 451.98 and 253.98 is: 350.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.78 : 451.98 = 253.98 : x
  2. Step 2: Convert to fraction form
    327.78/451.98 = 253.98/x
  3. Step 3: Cross multiply
    327.78x = 451.98 × 253.98
  4. Step 4: Simplify right side
    327.78x = 114,793.88
  5. Step 5: Solve for x
    x = 114,793.88/327.78
  6. Step 6: Final answer
    x = 350.22

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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.