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Finding the Fourth Proportional to 351.44, 485.06 and 220.36

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Solution

The fourth proportional to 351.44, 485.06 and 220.36 is: 304.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.44 : 485.06 = 220.36 : x
  2. Step 2: Convert to fraction form
    351.44/485.06 = 220.36/x
  3. Step 3: Cross multiply
    351.44x = 485.06 × 220.36
  4. Step 4: Simplify right side
    351.44x = 106,887.82
  5. Step 5: Solve for x
    x = 106,887.82/351.44
  6. Step 6: Final answer
    x = 304.14

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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.