Finding the Fourth Proportional to 209.19, 312.93 and 154.92
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Solution
The fourth proportional to 209.19, 312.93 and 154.92 is: 231.75
Step by Step Solution
- Step 1: Write the proportion equation
209.19 : 312.93 = 154.92 : x - Step 2: Convert to fraction form
209.19/312.93 = 154.92/x - Step 3: Cross multiply
209.19x = 312.93 × 154.92 - Step 4: Simplify right side
209.19x = 48,479.12 - Step 5: Solve for x
x = 48,479.12/209.19 - Step 6: Final answer
x = 231.75
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.