Finding the Fourth Proportional to 221.23, 305.28 and 122.99
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Solution
The fourth proportional to 221.23, 305.28 and 122.99 is: 169.72
Step by Step Solution
- Step 1: Write the proportion equation
221.23 : 305.28 = 122.99 : x - Step 2: Convert to fraction form
221.23/305.28 = 122.99/x - Step 3: Cross multiply
221.23x = 305.28 × 122.99 - Step 4: Simplify right side
221.23x = 37,546.39 - Step 5: Solve for x
x = 37,546.39/221.23 - Step 6: Final answer
x = 169.72
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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.