Finding the Fourth Proportional to 207.73, 311.59 and 85.99
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Solution
The fourth proportional to 207.73, 311.59 and 85.99 is: 128.99
Step by Step Solution
- Step 1: Write the proportion equation
207.73 : 311.59 = 85.99 : x - Step 2: Convert to fraction form
207.73/311.59 = 85.99/x - Step 3: Cross multiply
207.73x = 311.59 × 85.99 - Step 4: Simplify right side
207.73x = 26,793.41 - Step 5: Solve for x
x = 26,793.41/207.73 - Step 6: Final answer
x = 128.99
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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.