Finding the Fourth Proportional to 145.62, 218.67 and 84.80
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Solution
The fourth proportional to 145.62, 218.67 and 84.80 is: 127.33
Step by Step Solution
- Step 1: Write the proportion equation
145.62 : 218.67 = 84.80 : x - Step 2: Convert to fraction form
145.62/218.67 = 84.80/x - Step 3: Cross multiply
145.62x = 218.67 × 84.80 - Step 4: Simplify right side
145.62x = 18,542.21 - Step 5: Solve for x
x = 18,542.21/145.62 - Step 6: Final answer
x = 127.33
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.