Finding the Fourth Proportional to 207.44, 310.99 and 91.80
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Solution
The fourth proportional to 207.44, 310.99 and 91.80 is: 137.62
Step by Step Solution
- Step 1: Write the proportion equation
207.44 : 310.99 = 91.80 : x - Step 2: Convert to fraction form
207.44/310.99 = 91.80/x - Step 3: Cross multiply
207.44x = 310.99 × 91.80 - Step 4: Simplify right side
207.44x = 28,548.88 - Step 5: Solve for x
x = 28,548.88/207.44 - Step 6: Final answer
x = 137.62
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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.