Finding the Fourth Proportional to 660,386.20, 990,579.30 and 344,769.70
Calculator
Solution
The fourth proportional to 660,386.20, 990,579.30 and 344,769.70 is: 517,154.55
Step by Step Solution
- Step 1: Write the proportion equation
660,386.20 : 990,579.30 = 344,769.70 : x - Step 2: Convert to fraction form
660,386.20/990,579.30 = 344,769.70/x - Step 3: Cross multiply
660,386.20x = 990,579.30 × 344,769.70 - Step 4: Simplify right side
660,386.20x = 341,521,728,087.21 - Step 5: Solve for x
x = 341,521,728,087.21/660,386.20 - Step 6: Final answer
x = 517,154.55
Related Problems
Find fourth proportional to 330,193.10, 495,289.65 and 172,384.85
Half scale
Find fourth proportional to 1,320,772.40, 1,981,158.60 and 689,539.40
Double scale
Find fourth proportional to 660,387.20, 990,580.80 and 344,770.70
Similar ratio
Find fourth proportional to 990,579.30, 1,485,868.95 and 517,154.55
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.