Finding the Fourth Proportional to 227.21, 313.57 and 128.99
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Solution
The fourth proportional to 227.21, 313.57 and 128.99 is: 178.03
Step by Step Solution
- Step 1: Write the proportion equation
227.21 : 313.57 = 128.99 : x - Step 2: Convert to fraction form
227.21/313.57 = 128.99/x - Step 3: Cross multiply
227.21x = 313.57 × 128.99 - Step 4: Simplify right side
227.21x = 40,448.34 - Step 5: Solve for x
x = 40,448.34/227.21 - Step 6: Final answer
x = 178.03
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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.