Finding the Fourth Proportional to 215.79, 324.08 and 207.09
Calculator
Solution
The fourth proportional to 215.79, 324.08 and 207.09 is: 311.01
Step by Step Solution
- Step 1: Write the proportion equation
215.79 : 324.08 = 207.09 : x - Step 2: Convert to fraction form
215.79/324.08 = 207.09/x - Step 3: Cross multiply
215.79x = 324.08 × 207.09 - Step 4: Simplify right side
215.79x = 67,113.73 - Step 5: Solve for x
x = 67,113.73/215.79 - Step 6: Final answer
x = 311.01
Related Problems
Find fourth proportional to 107.90, 162.04 and 103.55
Half scale
Find fourth proportional to 431.58, 648.16 and 414.18
Double scale
Find fourth proportional to 216.79, 325.58 and 208.09
Similar ratio
Find fourth proportional to 323.69, 486.12 and 310.64
1.5x scale
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.