Finding the Fourth Proportional to 457.63, 686.42 and 132.99
Calculator
Solution
The fourth proportional to 457.63, 686.42 and 132.99 is: 199.48
Step by Step Solution
- Step 1: Write the proportion equation
457.63 : 686.42 = 132.99 : x - Step 2: Convert to fraction form
457.63/686.42 = 132.99/x - Step 3: Cross multiply
457.63x = 686.42 × 132.99 - Step 4: Simplify right side
457.63x = 91,287.00 - Step 5: Solve for x
x = 91,287.00/457.63 - Step 6: Final answer
x = 199.48
Related Problems
Find fourth proportional to 228.82, 343.21 and 66.50
Half scale
Find fourth proportional to 915.26, 1,372.84 and 265.98
Double scale
Find fourth proportional to 458.63, 687.92 and 133.99
Similar ratio
Find fourth proportional to 686.45, 1,029.63 and 199.49
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.