Finding the Fourth Proportional to 212.99, 319.49 and 68.71
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Solution
The fourth proportional to 212.99, 319.49 and 68.71 is: 103.06
Step by Step Solution
- Step 1: Write the proportion equation
212.99 : 319.49 = 68.71 : x - Step 2: Convert to fraction form
212.99/319.49 = 68.71/x - Step 3: Cross multiply
212.99x = 319.49 × 68.71 - Step 4: Simplify right side
212.99x = 21,951.02 - Step 5: Solve for x
x = 21,951.02/212.99 - Step 6: Final answer
x = 103.06
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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.