Finding the Fourth Proportional to 153.21, 229.26 and 84.80
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Solution
The fourth proportional to 153.21, 229.26 and 84.80 is: 126.89
Step by Step Solution
- Step 1: Write the proportion equation
153.21 : 229.26 = 84.80 : x - Step 2: Convert to fraction form
153.21/229.26 = 84.80/x - Step 3: Cross multiply
153.21x = 229.26 × 84.80 - Step 4: Simplify right side
153.21x = 19,441.25 - Step 5: Solve for x
x = 19,441.25/153.21 - Step 6: Final answer
x = 126.89
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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.