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Finding the Fourth Proportional to 397.09, 547.94 and 222.40

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Solution

The fourth proportional to 397.09, 547.94 and 222.40 is: 306.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.09 : 547.94 = 222.40 : x
  2. Step 2: Convert to fraction form
    397.09/547.94 = 222.40/x
  3. Step 3: Cross multiply
    397.09x = 547.94 × 222.40
  4. Step 4: Simplify right side
    397.09x = 121,858.00
  5. Step 5: Solve for x
    x = 121,858.00/397.09
  6. Step 6: Final answer
    x = 306.88

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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.