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Finding the Fourth Proportional to 397.51, 548.43 and 222.82

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Solution

The fourth proportional to 397.51, 548.43 and 222.82 is: 307.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.51 : 548.43 = 222.82 : x
  2. Step 2: Convert to fraction form
    397.51/548.43 = 222.82/x
  3. Step 3: Cross multiply
    397.51x = 548.43 × 222.82
  4. Step 4: Simplify right side
    397.51x = 122,198.43
  5. Step 5: Solve for x
    x = 122,198.43/397.51
  6. Step 6: Final answer
    x = 307.41

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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.