Finding the Fourth Proportional to 385.36, 531.76 and 214.99
Calculator
Solution
The fourth proportional to 385.36, 531.76 and 214.99 is: 296.67
Step by Step Solution
- Step 1: Write the proportion equation
385.36 : 531.76 = 214.99 : x - Step 2: Convert to fraction form
385.36/531.76 = 214.99/x - Step 3: Cross multiply
385.36x = 531.76 × 214.99 - Step 4: Simplify right side
385.36x = 114,323.08 - Step 5: Solve for x
x = 114,323.08/385.36 - Step 6: Final answer
x = 296.67
Related Problems
Find fourth proportional to 192.68, 265.88 and 107.50
Half scale
Find fourth proportional to 770.72, 1,063.52 and 429.98
Double scale
Find fourth proportional to 386.36, 533.14 and 215.99
Similar ratio
Find fourth proportional to 578.04, 797.64 and 322.49
1.5x scale
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.