Finding the Fourth Proportional to 207.28, 310.74 and 120.70
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Solution
The fourth proportional to 207.28, 310.74 and 120.70 is: 180.95
Step by Step Solution
- Step 1: Write the proportion equation
207.28 : 310.74 = 120.70 : x - Step 2: Convert to fraction form
207.28/310.74 = 120.70/x - Step 3: Cross multiply
207.28x = 310.74 × 120.70 - Step 4: Simplify right side
207.28x = 37,506.32 - Step 5: Solve for x
x = 37,506.32/207.28 - Step 6: Final answer
x = 180.95
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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.