Finding the Fourth Proportional to 221.22, 305.25 and 122.99
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Solution
The fourth proportional to 221.22, 305.25 and 122.99 is: 169.70
Step by Step Solution
- Step 1: Write the proportion equation
221.22 : 305.25 = 122.99 : x - Step 2: Convert to fraction form
221.22/305.25 = 122.99/x - Step 3: Cross multiply
221.22x = 305.25 × 122.99 - Step 4: Simplify right side
221.22x = 37,541.17 - Step 5: Solve for x
x = 37,541.17/221.22 - Step 6: Final answer
x = 169.70
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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.