Finding the Fourth Proportional to 221.62, 332.40 and 84.68
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Solution
The fourth proportional to 221.62, 332.40 and 84.68 is: 127.01
Step by Step Solution
- Step 1: Write the proportion equation
221.62 : 332.40 = 84.68 : x - Step 2: Convert to fraction form
221.62/332.40 = 84.68/x - Step 3: Cross multiply
221.62x = 332.40 × 84.68 - Step 4: Simplify right side
221.62x = 28,147.63 - Step 5: Solve for x
x = 28,147.63/221.62 - Step 6: Final answer
x = 127.01
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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.