Finding the Fourth Proportional to 209.36, 288.96 and 122.08
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Solution
The fourth proportional to 209.36, 288.96 and 122.08 is: 168.50
Step by Step Solution
- Step 1: Write the proportion equation
209.36 : 288.96 = 122.08 : x - Step 2: Convert to fraction form
209.36/288.96 = 122.08/x - Step 3: Cross multiply
209.36x = 288.96 × 122.08 - Step 4: Simplify right side
209.36x = 35,276.24 - Step 5: Solve for x
x = 35,276.24/209.36 - Step 6: Final answer
x = 168.50
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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.