Finding the Fourth Proportional to 753.65, 1,040.09 and 438.99
Calculator
Solution
The fourth proportional to 753.65, 1,040.09 and 438.99 is: 605.84
Step by Step Solution
- Step 1: Write the proportion equation
753.65 : 1,040.09 = 438.99 : x - Step 2: Convert to fraction form
753.65/1,040.09 = 438.99/x - Step 3: Cross multiply
753.65x = 1,040.09 × 438.99 - Step 4: Simplify right side
753.65x = 456,589.11 - Step 5: Solve for x
x = 456,589.11/753.65 - Step 6: Final answer
x = 605.84
Related Problems
Find fourth proportional to 376.83, 520.05 and 219.50
Half scale
Find fourth proportional to 1,507.30, 2,080.18 and 877.98
Double scale
Find fourth proportional to 754.65, 1,041.47 and 439.99
Similar ratio
Find fourth proportional to 1,130.48, 1,560.14 and 658.49
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.