Finding the Fourth Proportional to 209.70, 289.08 and 154.26
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Solution
The fourth proportional to 209.70, 289.08 and 154.26 is: 212.65
Step by Step Solution
- Step 1: Write the proportion equation
209.70 : 289.08 = 154.26 : x - Step 2: Convert to fraction form
209.70/289.08 = 154.26/x - Step 3: Cross multiply
209.70x = 289.08 × 154.26 - Step 4: Simplify right side
209.70x = 44,593.48 - Step 5: Solve for x
x = 44,593.48/209.70 - Step 6: Final answer
x = 212.65
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.