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Finding the Fourth Proportional to 553.39, 830.09 and 168.64

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Solution

The fourth proportional to 553.39, 830.09 and 168.64 is: 252.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.39 : 830.09 = 168.64 : x
  2. Step 2: Convert to fraction form
    553.39/830.09 = 168.64/x
  3. Step 3: Cross multiply
    553.39x = 830.09 × 168.64
  4. Step 4: Simplify right side
    553.39x = 139,990.44
  5. Step 5: Solve for x
    x = 139,990.44/553.39
  6. Step 6: Final answer
    x = 252.97

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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.