Finding the Fourth Proportional to 260.64, 390.99 and 98.32
Calculator
Solution
The fourth proportional to 260.64, 390.99 and 98.32 is: 147.49
Step by Step Solution
- Step 1: Write the proportion equation
260.64 : 390.99 = 98.32 : x - Step 2: Convert to fraction form
260.64/390.99 = 98.32/x - Step 3: Cross multiply
260.64x = 390.99 × 98.32 - Step 4: Simplify right side
260.64x = 38,442.14 - Step 5: Solve for x
x = 38,442.14/260.64 - Step 6: Final answer
x = 147.49
Related Problems
Find fourth proportional to 130.32, 195.50 and 49.16
Half scale
Find fourth proportional to 521.28, 781.98 and 196.64
Double scale
Find fourth proportional to 261.64, 392.49 and 99.32
Similar ratio
Find fourth proportional to 390.96, 586.49 and 147.48
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.