Finding the Fourth Proportional to 209.58, 288.99 and 135.81
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Solution
The fourth proportional to 209.58, 288.99 and 135.81 is: 187.27
Step by Step Solution
- Step 1: Write the proportion equation
209.58 : 288.99 = 135.81 : x - Step 2: Convert to fraction form
209.58/288.99 = 135.81/x - Step 3: Cross multiply
209.58x = 288.99 × 135.81 - Step 4: Simplify right side
209.58x = 39,247.73 - Step 5: Solve for x
x = 39,247.73/209.58 - Step 6: Final answer
x = 187.27
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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.