Finding the Fourth Proportional to 502, 692.80 and 280.99
Calculator
Solution
The fourth proportional to 502, 692.80 and 280.99 is: 387.79
Step by Step Solution
- Step 1: Write the proportion equation
502 : 692.80 = 280.99 : x - Step 2: Convert to fraction form
502/692.80 = 280.99/x - Step 3: Cross multiply
502x = 692.80 × 280.99 - Step 4: Simplify right side
502x = 194,669.87 - Step 5: Solve for x
x = 194,669.87/502 - Step 6: Final answer
x = 387.79
Related Problems
Find fourth proportional to 251, 346.40 and 140.50
Half scale
Find fourth proportional to 1,004, 1,385.60 and 561.98
Double scale
Find fourth proportional to 503, 694.18 and 281.99
Similar ratio
Find fourth proportional to 753, 1,039.20 and 421.49
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.