Finding the Fourth Proportional to 312.46, 430.97 and 201.99
Calculator
Solution
The fourth proportional to 312.46, 430.97 and 201.99 is: 278.61
Step by Step Solution
- Step 1: Write the proportion equation
312.46 : 430.97 = 201.99 : x - Step 2: Convert to fraction form
312.46/430.97 = 201.99/x - Step 3: Cross multiply
312.46x = 430.97 × 201.99 - Step 4: Simplify right side
312.46x = 87,053.37 - Step 5: Solve for x
x = 87,053.37/312.46 - Step 6: Final answer
x = 278.61
Related Problems
Find fourth proportional to 156.23, 215.49 and 101.00
Half scale
Find fourth proportional to 624.92, 861.94 and 403.99
Double scale
Find fourth proportional to 313.46, 432.35 and 202.99
Similar ratio
Find fourth proportional to 468.69, 646.46 and 302.99
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.