Finding the Fourth Proportional to 154.93, 213.79 and 84.99
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Solution
The fourth proportional to 154.93, 213.79 and 84.99 is: 117.28
Step by Step Solution
- Step 1: Write the proportion equation
154.93 : 213.79 = 84.99 : x - Step 2: Convert to fraction form
154.93/213.79 = 84.99/x - Step 3: Cross multiply
154.93x = 213.79 × 84.99 - Step 4: Simplify right side
154.93x = 18,170.01 - Step 5: Solve for x
x = 18,170.01/154.93 - Step 6: Final answer
x = 117.28
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.