Finding the Fourth Proportional to 311.25, 466.56 and 128.75
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Solution
The fourth proportional to 311.25, 466.56 and 128.75 is: 192.99
Step by Step Solution
- Step 1: Write the proportion equation
311.25 : 466.56 = 128.75 : x - Step 2: Convert to fraction form
311.25/466.56 = 128.75/x - Step 3: Cross multiply
311.25x = 466.56 × 128.75 - Step 4: Simplify right side
311.25x = 60,067.27 - Step 5: Solve for x
x = 60,067.27/311.25 - Step 6: Final answer
x = 192.99
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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.