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Finding the Fourth Proportional to 286.34, 395.16 and 161.99

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Solution

The fourth proportional to 286.34, 395.16 and 161.99 is: 223.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    286.34 : 395.16 = 161.99 : x
  2. Step 2: Convert to fraction form
    286.34/395.16 = 161.99/x
  3. Step 3: Cross multiply
    286.34x = 395.16 × 161.99
  4. Step 4: Simplify right side
    286.34x = 64,014.14
  5. Step 5: Solve for x
    x = 64,014.14/286.34
  6. Step 6: Final answer
    x = 223.56

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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.