Finding the Fourth Proportional to 215.99, 323.91 and 79.00
Calculator
Solution
The fourth proportional to 215.99, 323.91 and 79.00 is: 118.47
Step by Step Solution
- Step 1: Write the proportion equation
215.99 : 323.91 = 79.00 : x - Step 2: Convert to fraction form
215.99/323.91 = 79.00/x - Step 3: Cross multiply
215.99x = 323.91 × 79.00 - Step 4: Simplify right side
215.99x = 25,587.24 - Step 5: Solve for x
x = 25,587.24/215.99 - Step 6: Final answer
x = 118.47
Related Problems
Find fourth proportional to 107.99, 161.95 and 39.50
Half scale
Find fourth proportional to 431.97, 647.81 and 157.99
Double scale
Find fourth proportional to 216.99, 325.40 and 80
Similar ratio
Find fourth proportional to 323.98, 485.86 and 118.49
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.