Finding the Fourth Proportional to 559,989.80, 839,984.70 and 420,021.80
Calculator
Solution
The fourth proportional to 559,989.80, 839,984.70 and 420,021.80 is: 630,032.70
Step by Step Solution
- Step 1: Write the proportion equation
559,989.80 : 839,984.70 = 420,021.80 : x - Step 2: Convert to fraction form
559,989.80/839,984.70 = 420,021.80/x - Step 3: Cross multiply
559,989.80x = 839,984.70 × 420,021.80 - Step 4: Simplify right side
559,989.80x = 352,811,885,666.46 - Step 5: Solve for x
x = 352,811,885,666.46/559,989.80 - Step 6: Final answer
x = 630,032.70
Related Problems
Find fourth proportional to 279,994.90, 419,992.35 and 210,010.90
Half scale
Find fourth proportional to 1,119,979.60, 1,679,969.40 and 840,043.60
Double scale
Find fourth proportional to 559,990.80, 839,986.20 and 420,022.80
Similar ratio
Find fourth proportional to 839,984.70, 1,259,977.05 and 630,032.70
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.