Finding the Fourth Proportional to 212.81, 293.68 and 138.99
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Solution
The fourth proportional to 212.81, 293.68 and 138.99 is: 191.80
Step by Step Solution
- Step 1: Write the proportion equation
212.81 : 293.68 = 138.99 : x - Step 2: Convert to fraction form
212.81/293.68 = 138.99/x - Step 3: Cross multiply
212.81x = 293.68 × 138.99 - Step 4: Simplify right side
212.81x = 40,817.89 - Step 5: Solve for x
x = 40,817.89/212.81 - Step 6: Final answer
x = 191.80
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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.