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Finding the Fourth Proportional to 352.06, 485.89 and 204.78

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Solution

The fourth proportional to 352.06, 485.89 and 204.78 is: 282.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.06 : 485.89 = 204.78 : x
  2. Step 2: Convert to fraction form
    352.06/485.89 = 204.78/x
  3. Step 3: Cross multiply
    352.06x = 485.89 × 204.78
  4. Step 4: Simplify right side
    352.06x = 99,500.55
  5. Step 5: Solve for x
    x = 99,500.55/352.06
  6. Step 6: Final answer
    x = 282.62

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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.