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Finding the Fourth Proportional to 323.75, 485.76 and 131.51

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Solution

The fourth proportional to 323.75, 485.76 and 131.51 is: 197.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    323.75 : 485.76 = 131.51 : x
  2. Step 2: Convert to fraction form
    323.75/485.76 = 131.51/x
  3. Step 3: Cross multiply
    323.75x = 485.76 × 131.51
  4. Step 4: Simplify right side
    323.75x = 63,879.87
  5. Step 5: Solve for x
    x = 63,879.87/323.75
  6. Step 6: Final answer
    x = 197.32

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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.