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Finding the Fourth Proportional to 351.75, 485.30 and 204.33

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Solution

The fourth proportional to 351.75, 485.30 and 204.33 is: 281.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.75 : 485.30 = 204.33 : x
  2. Step 2: Convert to fraction form
    351.75/485.30 = 204.33/x
  3. Step 3: Cross multiply
    351.75x = 485.30 × 204.33
  4. Step 4: Simplify right side
    351.75x = 99,157.90
  5. Step 5: Solve for x
    x = 99,157.90/351.75
  6. Step 6: Final answer
    x = 281.90

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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.