Finding the Fourth Proportional to 74.44, 110.79 and 74.28
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Solution
The fourth proportional to 74.44, 110.79 and 74.28 is: 110.55
Step by Step Solution
- Step 1: Write the proportion equation
74.44 : 110.79 = 74.28 : x - Step 2: Convert to fraction form
74.44/110.79 = 74.28/x - Step 3: Cross multiply
74.44x = 110.79 × 74.28 - Step 4: Simplify right side
74.44x = 8,229.48 - Step 5: Solve for x
x = 8,229.48/74.44 - Step 6: Final answer
x = 110.55
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.