Finding the Fourth Proportional to 861,643.80, 1,292,465.70 and 221,946.30
Calculator
Solution
The fourth proportional to 861,643.80, 1,292,465.70 and 221,946.30 is: 332,919.45
Step by Step Solution
- Step 1: Write the proportion equation
861,643.80 : 1,292,465.70 = 221,946.30 : x - Step 2: Convert to fraction form
861,643.80/1,292,465.70 = 221,946.30/x - Step 3: Cross multiply
861,643.80x = 1,292,465.70 × 221,946.30 - Step 4: Simplify right side
861,643.80x = 286,857,979,991.91 - Step 5: Solve for x
x = 286,857,979,991.91/861,643.80 - Step 6: Final answer
x = 332,919.45
Related Problems
Find fourth proportional to 430,821.90, 646,232.85 and 110,973.15
Half scale
Find fourth proportional to 1,723,287.60, 2,584,931.40 and 443,892.60
Double scale
Find fourth proportional to 861,644.80, 1,292,467.20 and 221,947.30
Similar ratio
Find fourth proportional to 1,292,465.70, 1,938,698.55 and 332,919.45
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.