Finding the Fourth Proportional to 2,106.74, 3,160 and 645.79
Calculator
Solution
The fourth proportional to 2,106.74, 3,160 and 645.79 is: 968.65
Step by Step Solution
- Step 1: Write the proportion equation
2,106.74 : 3,160 = 645.79 : x - Step 2: Convert to fraction form
2,106.74/3,160 = 645.79/x - Step 3: Cross multiply
2,106.74x = 3,160 × 645.79 - Step 4: Simplify right side
2,106.74x = 2,040,696.40 - Step 5: Solve for x
x = 2,040,696.40/2,106.74 - Step 6: Final answer
x = 968.65
Related Problems
Find fourth proportional to 1,053.37, 1,580 and 322.90
Half scale
Find fourth proportional to 4,213.48, 6,320 and 1,291.58
Double scale
Find fourth proportional to 2,107.74, 3,161.50 and 646.79
Similar ratio
Find fourth proportional to 3,160.11, 4,740 and 968.69
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.