Finding the Fourth Proportional to 611,785.80, 917,678.70 and 257,491.80
Calculator
Solution
The fourth proportional to 611,785.80, 917,678.70 and 257,491.80 is: 386,237.70
Step by Step Solution
- Step 1: Write the proportion equation
611,785.80 : 917,678.70 = 257,491.80 : x - Step 2: Convert to fraction form
611,785.80/917,678.70 = 257,491.80/x - Step 3: Cross multiply
611,785.80x = 917,678.70 × 257,491.80 - Step 4: Simplify right side
611,785.80x = 236,294,740,284.66 - Step 5: Solve for x
x = 236,294,740,284.66/611,785.80 - Step 6: Final answer
x = 386,237.70
Related Problems
Find fourth proportional to 305,892.90, 458,839.35 and 128,745.90
Half scale
Find fourth proportional to 1,223,571.60, 1,835,357.40 and 514,983.60
Double scale
Find fourth proportional to 611,786.80, 917,680.20 and 257,492.80
Similar ratio
Find fourth proportional to 917,678.70, 1,376,518.05 and 386,237.70
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.