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Finding the Fourth Proportional to 401.83, 554.54 and 222.38

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Solution

The fourth proportional to 401.83, 554.54 and 222.38 is: 306.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.83 : 554.54 = 222.38 : x
  2. Step 2: Convert to fraction form
    401.83/554.54 = 222.38/x
  3. Step 3: Cross multiply
    401.83x = 554.54 × 222.38
  4. Step 4: Simplify right side
    401.83x = 123,314.72
  5. Step 5: Solve for x
    x = 123,314.72/401.83
  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.