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Finding the Fourth Proportional to 368.86, 553.37 and 108.85

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Solution

The fourth proportional to 368.86, 553.37 and 108.85 is: 163.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.86 : 553.37 = 108.85 : x
  2. Step 2: Convert to fraction form
    368.86/553.37 = 108.85/x
  3. Step 3: Cross multiply
    368.86x = 553.37 × 108.85
  4. Step 4: Simplify right side
    368.86x = 60,234.32
  5. Step 5: Solve for x
    x = 60,234.32/368.86
  6. Step 6: Final answer
    x = 163.30

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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.