Finding the Fourth Proportional to 216.70, 324.97 and 79.71
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Solution
The fourth proportional to 216.70, 324.97 and 79.71 is: 119.54
Step by Step Solution
- Step 1: Write the proportion equation
216.70 : 324.97 = 79.71 : x - Step 2: Convert to fraction form
216.70/324.97 = 79.71/x - Step 3: Cross multiply
216.70x = 324.97 × 79.71 - Step 4: Simplify right side
216.70x = 25,903.36 - Step 5: Solve for x
x = 25,903.36/216.70 - Step 6: Final answer
x = 119.54
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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.