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Finding the Fourth Proportional to 369.45, 553.95 and 163.86

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Solution

The fourth proportional to 369.45, 553.95 and 163.86 is: 245.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    369.45 : 553.95 = 163.86 : x
  2. Step 2: Convert to fraction form
    369.45/553.95 = 163.86/x
  3. Step 3: Cross multiply
    369.45x = 553.95 × 163.86
  4. Step 4: Simplify right side
    369.45x = 90,770.25
  5. Step 5: Solve for x
    x = 90,770.25/369.45
  6. Step 6: Final answer
    x = 245.69

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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.