Finding the Fourth Proportional to 211.97, 289.99 and 211.06
Calculator
Solution
The fourth proportional to 211.97, 289.99 and 211.06 is: 288.75
Step by Step Solution
- Step 1: Write the proportion equation
211.97 : 289.99 = 211.06 : x - Step 2: Convert to fraction form
211.97/289.99 = 211.06/x - Step 3: Cross multiply
211.97x = 289.99 × 211.06 - Step 4: Simplify right side
211.97x = 61,204.63 - Step 5: Solve for x
x = 61,204.63/211.97 - Step 6: Final answer
x = 288.75
Related Problems
Find fourth proportional to 105.98, 145.00 and 105.53
Half scale
Find fourth proportional to 423.93, 579.99 and 422.11
Double scale
Find fourth proportional to 212.97, 291.36 and 212.06
Similar ratio
Find fourth proportional to 317.95, 434.99 and 316.58
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.