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Finding the Fourth Proportional to 327.15, 490.05 and 245.75

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Solution

The fourth proportional to 327.15, 490.05 and 245.75 is: 368.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    327.15 : 490.05 = 245.75 : x
  2. Step 2: Convert to fraction form
    327.15/490.05 = 245.75/x
  3. Step 3: Cross multiply
    327.15x = 490.05 × 245.75
  4. Step 4: Simplify right side
    327.15x = 120,427.34
  5. Step 5: Solve for x
    x = 120,427.34/327.15
  6. Step 6: Final answer
    x = 368.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.