Finding the Fourth Proportional to 212.63, 318.99 and 68.34
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Solution
The fourth proportional to 212.63, 318.99 and 68.34 is: 102.53
Step by Step Solution
- Step 1: Write the proportion equation
212.63 : 318.99 = 68.34 : x - Step 2: Convert to fraction form
212.63/318.99 = 68.34/x - Step 3: Cross multiply
212.63x = 318.99 × 68.34 - Step 4: Simplify right side
212.63x = 21,800.84 - Step 5: Solve for x
x = 21,800.84/212.63 - Step 6: Final answer
x = 102.53
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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.