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Finding the Fourth Proportional to 352.73, 486.56 and 221.63

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Solution

The fourth proportional to 352.73, 486.56 and 221.63 is: 305.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.73 : 486.56 = 221.63 : x
  2. Step 2: Convert to fraction form
    352.73/486.56 = 221.63/x
  3. Step 3: Cross multiply
    352.73x = 486.56 × 221.63
  4. Step 4: Simplify right side
    352.73x = 107,835.18
  5. Step 5: Solve for x
    x = 107,835.18/352.73
  6. Step 6: Final answer
    x = 305.72

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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.