Finding the Fourth Proportional to 202.87, 304.36 and 81.22
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Solution
The fourth proportional to 202.87, 304.36 and 81.22 is: 121.85
Step by Step Solution
- Step 1: Write the proportion equation
202.87 : 304.36 = 81.22 : x - Step 2: Convert to fraction form
202.87/304.36 = 81.22/x - Step 3: Cross multiply
202.87x = 304.36 × 81.22 - Step 4: Simplify right side
202.87x = 24,718.44 - Step 5: Solve for x
x = 24,718.44/202.87 - Step 6: Final answer
x = 121.85
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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.