Finding the Fourth Proportional to 221.21, 305.24 and 122.95
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Solution
The fourth proportional to 221.21, 305.24 and 122.95 is: 169.65
Step by Step Solution
- Step 1: Write the proportion equation
221.21 : 305.24 = 122.95 : x - Step 2: Convert to fraction form
221.21/305.24 = 122.95/x - Step 3: Cross multiply
221.21x = 305.24 × 122.95 - Step 4: Simplify right side
221.21x = 37,527.12 - Step 5: Solve for x
x = 37,527.12/221.21 - Step 6: Final answer
x = 169.65
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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.