Finding the Fourth Proportional to 840,937.70, 1,261,406.55 and 486,643.70
Calculator
Solution
The fourth proportional to 840,937.70, 1,261,406.55 and 486,643.70 is: 729,965.55
Step by Step Solution
- Step 1: Write the proportion equation
840,937.70 : 1,261,406.55 = 486,643.70 : x - Step 2: Convert to fraction form
840,937.70/1,261,406.55 = 486,643.70/x - Step 3: Cross multiply
840,937.70x = 1,261,406.55 × 486,643.70 - Step 4: Simplify right side
840,937.70x = 613,855,550,696.24 - Step 5: Solve for x
x = 613,855,550,696.24/840,937.70 - Step 6: Final answer
x = 729,965.55
Related Problems
Find fourth proportional to 420,468.85, 630,703.28 and 243,321.85
Half scale
Find fourth proportional to 1,681,875.40, 2,522,813.10 and 973,287.40
Double scale
Find fourth proportional to 840,938.70, 1,261,408.05 and 486,644.70
Similar ratio
Find fourth proportional to 1,261,406.55, 1,892,109.83 and 729,965.55
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.