Finding the Fourth Proportional to 221.14, 305.18 and 122.91
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Solution
The fourth proportional to 221.14, 305.18 and 122.91 is: 169.62
Step by Step Solution
- Step 1: Write the proportion equation
221.14 : 305.18 = 122.91 : x - Step 2: Convert to fraction form
221.14/305.18 = 122.91/x - Step 3: Cross multiply
221.14x = 305.18 × 122.91 - Step 4: Simplify right side
221.14x = 37,509.67 - Step 5: Solve for x
x = 37,509.67/221.14 - Step 6: Final answer
x = 169.62
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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.