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Finding the Fourth Proportional to 352.16, 485.89 and 227.78

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Solution

The fourth proportional to 352.16, 485.89 and 227.78 is: 314.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.16 : 485.89 = 227.78 : x
  2. Step 2: Convert to fraction form
    352.16/485.89 = 227.78/x
  3. Step 3: Cross multiply
    352.16x = 485.89 × 227.78
  4. Step 4: Simplify right side
    352.16x = 110,676.02
  5. Step 5: Solve for x
    x = 110,676.02/352.16
  6. Step 6: Final answer
    x = 314.28

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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.