Finding the Fourth Proportional to 209.79, 314.67 and 87.99
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Solution
The fourth proportional to 209.79, 314.67 and 87.99 is: 131.98
Step by Step Solution
- Step 1: Write the proportion equation
209.79 : 314.67 = 87.99 : x - Step 2: Convert to fraction form
209.79/314.67 = 87.99/x - Step 3: Cross multiply
209.79x = 314.67 × 87.99 - Step 4: Simplify right side
209.79x = 27,687.81 - Step 5: Solve for x
x = 27,687.81/209.79 - Step 6: Final answer
x = 131.98
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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.