Finding the Fourth Proportional to 579.54, 869.07 and 396.99
Calculator
Solution
The fourth proportional to 579.54, 869.07 and 396.99 is: 595.32
Step by Step Solution
- Step 1: Write the proportion equation
579.54 : 869.07 = 396.99 : x - Step 2: Convert to fraction form
579.54/869.07 = 396.99/x - Step 3: Cross multiply
579.54x = 869.07 × 396.99 - Step 4: Simplify right side
579.54x = 345,012.10 - Step 5: Solve for x
x = 345,012.10/579.54 - Step 6: Final answer
x = 595.32
Related Problems
Find fourth proportional to 289.77, 434.54 and 198.50
Half scale
Find fourth proportional to 1,159.08, 1,738.14 and 793.98
Double scale
Find fourth proportional to 580.54, 870.57 and 397.99
Similar ratio
Find fourth proportional to 869.31, 1,303.61 and 595.49
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.