Finding the Fourth Proportional to 642,331.80, 963,497.70 and 430,824.60
Calculator
Solution
The fourth proportional to 642,331.80, 963,497.70 and 430,824.60 is: 646,236.90
Step by Step Solution
- Step 1: Write the proportion equation
642,331.80 : 963,497.70 = 430,824.60 : x - Step 2: Convert to fraction form
642,331.80/963,497.70 = 430,824.60/x - Step 3: Cross multiply
642,331.80x = 963,497.70 × 430,824.60 - Step 4: Simplify right side
642,331.80x = 415,098,511,203.42 - Step 5: Solve for x
x = 415,098,511,203.42/642,331.80 - Step 6: Final answer
x = 646,236.90
Related Problems
Find fourth proportional to 321,165.90, 481,748.85 and 215,412.30
Half scale
Find fourth proportional to 1,284,663.60, 1,926,995.40 and 861,649.20
Double scale
Find fourth proportional to 642,332.80, 963,499.20 and 430,825.60
Similar ratio
Find fourth proportional to 963,497.70, 1,445,246.55 and 646,236.90
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.