Finding the Fourth Proportional to 207.74, 311.70 and 121.10
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Solution
The fourth proportional to 207.74, 311.70 and 121.10 is: 181.70
Step by Step Solution
- Step 1: Write the proportion equation
207.74 : 311.70 = 121.10 : x - Step 2: Convert to fraction form
207.74/311.70 = 121.10/x - Step 3: Cross multiply
207.74x = 311.70 × 121.10 - Step 4: Simplify right side
207.74x = 37,746.87 - Step 5: Solve for x
x = 37,746.87/207.74 - Step 6: Final answer
x = 181.70
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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.