Finding the Fourth Proportional to 216.23, 298.40 and 122.99
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Solution
The fourth proportional to 216.23, 298.40 and 122.99 is: 169.72
Step by Step Solution
- Step 1: Write the proportion equation
216.23 : 298.40 = 122.99 : x - Step 2: Convert to fraction form
216.23/298.40 = 122.99/x - Step 3: Cross multiply
216.23x = 298.40 × 122.99 - Step 4: Simplify right side
216.23x = 36,698.11 - Step 5: Solve for x
x = 36,698.11/216.23 - Step 6: Final answer
x = 169.72
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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.