Finding the Fourth Proportional to 391,065.71, 539,391.89 and 358,903.99
Calculator
Solution
The fourth proportional to 391,065.71, 539,391.89 and 358,903.99 is: 495,031.65
Step by Step Solution
- Step 1: Write the proportion equation
391,065.71 : 539,391.89 = 358,903.99 : x - Step 2: Convert to fraction form
391,065.71/539,391.89 = 358,903.99/x - Step 3: Cross multiply
391,065.71x = 539,391.89 × 358,903.99 - Step 4: Simplify right side
391,065.71x = 193,589,899,700.12 - Step 5: Solve for x
x = 193,589,899,700.12/391,065.71 - Step 6: Final answer
x = 495,031.65
Related Problems
Find fourth proportional to 195,532.85, 269,695.94 and 179,452.00
Half scale
Find fourth proportional to 782,131.41, 1,078,783.77 and 717,807.98
Double scale
Find fourth proportional to 391,066.71, 539,393.26 and 358,904.99
Similar ratio
Find fourth proportional to 586,598.56, 809,087.83 and 538,355.99
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.