Finding the Fourth Proportional to 442,997.70, 664,496.55 and 390,509.70
Calculator
Solution
The fourth proportional to 442,997.70, 664,496.55 and 390,509.70 is: 585,764.55
Step by Step Solution
- Step 1: Write the proportion equation
442,997.70 : 664,496.55 = 390,509.70 : x - Step 2: Convert to fraction form
442,997.70/664,496.55 = 390,509.70/x - Step 3: Cross multiply
442,997.70x = 664,496.55 × 390,509.70 - Step 4: Simplify right side
442,997.70x = 259,492,348,391.54 - Step 5: Solve for x
x = 259,492,348,391.54/442,997.70 - Step 6: Final answer
x = 585,764.55
Related Problems
Find fourth proportional to 221,498.85, 332,248.28 and 195,254.85
Half scale
Find fourth proportional to 885,995.40, 1,328,993.10 and 781,019.40
Double scale
Find fourth proportional to 442,998.70, 664,498.05 and 390,510.70
Similar ratio
Find fourth proportional to 664,496.55, 996,744.83 and 585,764.55
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.