Finding the Fourth Proportional to 207.70, 311.18 and 125.28
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Solution
The fourth proportional to 207.70, 311.18 and 125.28 is: 187.70
Step by Step Solution
- Step 1: Write the proportion equation
207.70 : 311.18 = 125.28 : x - Step 2: Convert to fraction form
207.70/311.18 = 125.28/x - Step 3: Cross multiply
207.70x = 311.18 × 125.28 - Step 4: Simplify right side
207.70x = 38,984.00 - Step 5: Solve for x
x = 38,984.00/207.70 - Step 6: Final answer
x = 187.70
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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.