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Finding the Fourth Proportional to 243.99, 336.74 and 161.27

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Solution

The fourth proportional to 243.99, 336.74 and 161.27 is: 222.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.99 : 336.74 = 161.27 : x
  2. Step 2: Convert to fraction form
    243.99/336.74 = 161.27/x
  3. Step 3: Cross multiply
    243.99x = 336.74 × 161.27
  4. Step 4: Simplify right side
    243.99x = 54,303.57
  5. Step 5: Solve for x
    x = 54,303.57/243.99
  6. Step 6: Final answer
    x = 222.56

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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.