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Finding the Fourth Proportional to 323.30, 485.12 and 131.06

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Solution

The fourth proportional to 323.30, 485.12 and 131.06 is: 196.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.30 : 485.12 = 131.06 : x
  2. Step 2: Convert to fraction form
    323.30/485.12 = 131.06/x
  3. Step 3: Cross multiply
    323.30x = 485.12 × 131.06
  4. Step 4: Simplify right side
    323.30x = 63,577.73
  5. Step 5: Solve for x
    x = 63,577.73/323.30
  6. Step 6: Final answer
    x = 196.66

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