Finding the Fourth Proportional to 221.52, 305.66 and 126.99
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Solution
The fourth proportional to 221.52, 305.66 and 126.99 is: 175.22
Step by Step Solution
- Step 1: Write the proportion equation
221.52 : 305.66 = 126.99 : x - Step 2: Convert to fraction form
221.52/305.66 = 126.99/x - Step 3: Cross multiply
221.52x = 305.66 × 126.99 - Step 4: Simplify right side
221.52x = 38,815.13 - Step 5: Solve for x
x = 38,815.13/221.52 - Step 6: Final answer
x = 175.22
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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.