Finding the Fourth Proportional to 221.74, 332.42 and 84.70
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Solution
The fourth proportional to 221.74, 332.42 and 84.70 is: 126.98
Step by Step Solution
- Step 1: Write the proportion equation
221.74 : 332.42 = 84.70 : x - Step 2: Convert to fraction form
221.74/332.42 = 84.70/x - Step 3: Cross multiply
221.74x = 332.42 × 84.70 - Step 4: Simplify right side
221.74x = 28,155.97 - Step 5: Solve for x
x = 28,155.97/221.74 - Step 6: Final answer
x = 126.98
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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.