Finding the Fourth Proportional to 207.20, 310.95 and 115.80
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Solution
The fourth proportional to 207.20, 310.95 and 115.80 is: 173.78
Step by Step Solution
- Step 1: Write the proportion equation
207.20 : 310.95 = 115.80 : x - Step 2: Convert to fraction form
207.20/310.95 = 115.80/x - Step 3: Cross multiply
207.20x = 310.95 × 115.80 - Step 4: Simplify right side
207.20x = 36,008.01 - Step 5: Solve for x
x = 36,008.01/207.20 - Step 6: Final answer
x = 173.78
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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.