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Finding the Fourth Proportional to 352.36, 486.43 and 221.44

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Solution

The fourth proportional to 352.36, 486.43 and 221.44 is: 305.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.36 : 486.43 = 221.44 : x
  2. Step 2: Convert to fraction form
    352.36/486.43 = 221.44/x
  3. Step 3: Cross multiply
    352.36x = 486.43 × 221.44
  4. Step 4: Simplify right side
    352.36x = 107,715.06
  5. Step 5: Solve for x
    x = 107,715.06/352.36
  6. Step 6: Final answer
    x = 305.70

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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.