Finding the Fourth Proportional to 469.68, 649.08 and 380.99
Calculator
Solution
The fourth proportional to 469.68, 649.08 and 380.99 is: 526.51
Step by Step Solution
- Step 1: Write the proportion equation
469.68 : 649.08 = 380.99 : x - Step 2: Convert to fraction form
469.68/649.08 = 380.99/x - Step 3: Cross multiply
469.68x = 649.08 × 380.99 - Step 4: Simplify right side
469.68x = 247,289.74 - Step 5: Solve for x
x = 247,289.74/469.68 - Step 6: Final answer
x = 526.51
Related Problems
Find fourth proportional to 234.84, 324.54 and 190.49
Half scale
Find fourth proportional to 939.36, 1,298.16 and 761.97
Double scale
Find fourth proportional to 470.68, 650.46 and 381.99
Similar ratio
Find fourth proportional to 704.52, 973.62 and 571.48
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.