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Finding the Fourth Proportional to 401.45, 554.01 and 222.00

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Solution

The fourth proportional to 401.45, 554.01 and 222.00 is: 306.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.45 : 554.01 = 222.00 : x
  2. Step 2: Convert to fraction form
    401.45/554.01 = 222.00/x
  3. Step 3: Cross multiply
    401.45x = 554.01 × 222.00
  4. Step 4: Simplify right side
    401.45x = 122,988.87
  5. Step 5: Solve for x
    x = 122,988.87/401.45
  6. Step 6: Final answer
    x = 306.36

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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.