Finding the Fourth Proportional to 212.25, 318.09 and 120.99
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Solution
The fourth proportional to 212.25, 318.09 and 120.99 is: 181.32
Step by Step Solution
- Step 1: Write the proportion equation
212.25 : 318.09 = 120.99 : x - Step 2: Convert to fraction form
212.25/318.09 = 120.99/x - Step 3: Cross multiply
212.25x = 318.09 × 120.99 - Step 4: Simplify right side
212.25x = 38,485.71 - Step 5: Solve for x
x = 38,485.71/212.25 - Step 6: Final answer
x = 181.32
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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.