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Finding the Fourth Proportional to 352.30, 486.03 and 221.23

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Solution

The fourth proportional to 352.30, 486.03 and 221.23 is: 305.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.30 : 486.03 = 221.23 : x
  2. Step 2: Convert to fraction form
    352.30/486.03 = 221.23/x
  3. Step 3: Cross multiply
    352.30x = 486.03 × 221.23
  4. Step 4: Simplify right side
    352.30x = 107,524.42
  5. Step 5: Solve for x
    x = 107,524.42/352.30
  6. Step 6: Final answer
    x = 305.21

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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.