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Finding the Fourth Proportional to 369.28, 553.56 and 163.72

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Solution

The fourth proportional to 369.28, 553.56 and 163.72 is: 245.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.28 : 553.56 = 163.72 : x
  2. Step 2: Convert to fraction form
    369.28/553.56 = 163.72/x
  3. Step 3: Cross multiply
    369.28x = 553.56 × 163.72
  4. Step 4: Simplify right side
    369.28x = 90,628.84
  5. Step 5: Solve for x
    x = 90,628.84/369.28
  6. Step 6: Final answer
    x = 245.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.