Finding the Fourth Proportional to 207.40, 311.08 and 79.08
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Solution
The fourth proportional to 207.40, 311.08 and 79.08 is: 118.61
Step by Step Solution
- Step 1: Write the proportion equation
207.40 : 311.08 = 79.08 : x - Step 2: Convert to fraction form
207.40/311.08 = 79.08/x - Step 3: Cross multiply
207.40x = 311.08 × 79.08 - Step 4: Simplify right side
207.40x = 24,600.21 - Step 5: Solve for x
x = 24,600.21/207.40 - Step 6: Final answer
x = 118.61
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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.