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Finding the Fourth Proportional to 323.67, 485.64 and 131.25

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Solution

The fourth proportional to 323.67, 485.64 and 131.25 is: 196.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.67 : 485.64 = 131.25 : x
  2. Step 2: Convert to fraction form
    323.67/485.64 = 131.25/x
  3. Step 3: Cross multiply
    323.67x = 485.64 × 131.25
  4. Step 4: Simplify right side
    323.67x = 63,740.25
  5. Step 5: Solve for x
    x = 63,740.25/323.67
  6. Step 6: Final answer
    x = 196.93

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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.