Finding the Fourth Proportional to 222.42, 306.97 and 129.17
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Solution
The fourth proportional to 222.42, 306.97 and 129.17 is: 178.27
Step by Step Solution
- Step 1: Write the proportion equation
222.42 : 306.97 = 129.17 : x - Step 2: Convert to fraction form
222.42/306.97 = 129.17/x - Step 3: Cross multiply
222.42x = 306.97 × 129.17 - Step 4: Simplify right side
222.42x = 39,652.49 - Step 5: Solve for x
x = 39,652.49/222.42 - Step 6: Final answer
x = 178.27
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.