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Finding the Fourth Proportional to 351.93, 485.43 and 221.01

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Solution

The fourth proportional to 351.93, 485.43 and 221.01 is: 304.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.93 : 485.43 = 221.01 : x
  2. Step 2: Convert to fraction form
    351.93/485.43 = 221.01/x
  3. Step 3: Cross multiply
    351.93x = 485.43 × 221.01
  4. Step 4: Simplify right side
    351.93x = 107,284.88
  5. Step 5: Solve for x
    x = 107,284.88/351.93
  6. Step 6: Final answer
    x = 304.85

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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.