Finding the Fourth Proportional to 206.79, 310.11 and 84.99
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Solution
The fourth proportional to 206.79, 310.11 and 84.99 is: 127.45
Step by Step Solution
- Step 1: Write the proportion equation
206.79 : 310.11 = 84.99 : x - Step 2: Convert to fraction form
206.79/310.11 = 84.99/x - Step 3: Cross multiply
206.79x = 310.11 × 84.99 - Step 4: Simplify right side
206.79x = 26,356.25 - Step 5: Solve for x
x = 26,356.25/206.79 - Step 6: Final answer
x = 127.45
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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.