Finding the Fourth Proportional to 216.18, 298.34 and 142.69
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Solution
The fourth proportional to 216.18, 298.34 and 142.69 is: 196.92
Step by Step Solution
- Step 1: Write the proportion equation
216.18 : 298.34 = 142.69 : x - Step 2: Convert to fraction form
216.18/298.34 = 142.69/x - Step 3: Cross multiply
216.18x = 298.34 × 142.69 - Step 4: Simplify right side
216.18x = 42,570.13 - Step 5: Solve for x
x = 42,570.13/216.18 - Step 6: Final answer
x = 196.92
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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.