Finding the Fourth Proportional to 209.62, 312.19 and 207.19
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Solution
The fourth proportional to 209.62, 312.19 and 207.19 is: 308.57
Step by Step Solution
- Step 1: Write the proportion equation
209.62 : 312.19 = 207.19 : x - Step 2: Convert to fraction form
209.62/312.19 = 207.19/x - Step 3: Cross multiply
209.62x = 312.19 × 207.19 - Step 4: Simplify right side
209.62x = 64,681.09 - Step 5: Solve for x
x = 64,681.09/209.62 - Step 6: Final answer
x = 308.57
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.