Finding the Fourth Proportional to 207.30, 311.08 and 104.70
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Solution
The fourth proportional to 207.30, 311.08 and 104.70 is: 157.12
Step by Step Solution
- Step 1: Write the proportion equation
207.30 : 311.08 = 104.70 : x - Step 2: Convert to fraction form
207.30/311.08 = 104.70/x - Step 3: Cross multiply
207.30x = 311.08 × 104.70 - Step 4: Simplify right side
207.30x = 32,570.08 - Step 5: Solve for x
x = 32,570.08/207.30 - Step 6: Final answer
x = 157.12
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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.