Finding the Fourth Proportional to 221.08, 305.09 and 122.84
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Solution
The fourth proportional to 221.08, 305.09 and 122.84 is: 169.51
Step by Step Solution
- Step 1: Write the proportion equation
221.08 : 305.09 = 122.84 : x - Step 2: Convert to fraction form
221.08/305.09 = 122.84/x - Step 3: Cross multiply
221.08x = 305.09 × 122.84 - Step 4: Simplify right side
221.08x = 37,475.73 - Step 5: Solve for x
x = 37,475.73/221.08 - Step 6: Final answer
x = 169.51
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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.