Finding the Fourth Proportional to 207.19, 310.87 and 91.73
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Solution
The fourth proportional to 207.19, 310.87 and 91.73 is: 137.63
Step by Step Solution
- Step 1: Write the proportion equation
207.19 : 310.87 = 91.73 : x - Step 2: Convert to fraction form
207.19/310.87 = 91.73/x - Step 3: Cross multiply
207.19x = 310.87 × 91.73 - Step 4: Simplify right side
207.19x = 28,516.11 - Step 5: Solve for x
x = 28,516.11/207.19 - Step 6: Final answer
x = 137.63
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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.