Finding the Fourth Proportional to 640,864.40, 960,259.80 and 403,782.80
Calculator
Solution
The fourth proportional to 640,864.40, 960,259.80 and 403,782.80 is: 605,020.95
Step by Step Solution
- Step 1: Write the proportion equation
640,864.40 : 960,259.80 = 403,782.80 : x - Step 2: Convert to fraction form
640,864.40/960,259.80 = 403,782.80/x - Step 3: Cross multiply
640,864.40x = 960,259.80 × 403,782.80 - Step 4: Simplify right side
640,864.40x = 387,736,390,771.44 - Step 5: Solve for x
x = 387,736,390,771.44/640,864.40 - Step 6: Final answer
x = 605,020.95
Related Problems
Find fourth proportional to 320,432.20, 480,129.90 and 201,891.40
Half scale
Find fourth proportional to 1,281,728.80, 1,920,519.60 and 807,565.60
Double scale
Find fourth proportional to 640,865.40, 960,261.30 and 403,783.80
Similar ratio
Find fourth proportional to 961,296.60, 1,440,389.70 and 605,674.20
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.