Finding the Fourth Proportional to 256.57, 384.89 and 73.99
Calculator
Solution
The fourth proportional to 256.57, 384.89 and 73.99 is: 111.00
Step by Step Solution
- Step 1: Write the proportion equation
256.57 : 384.89 = 73.99 : x - Step 2: Convert to fraction form
256.57/384.89 = 73.99/x - Step 3: Cross multiply
256.57x = 384.89 × 73.99 - Step 4: Simplify right side
256.57x = 28,478.01 - Step 5: Solve for x
x = 28,478.01/256.57 - Step 6: Final answer
x = 111.00
Related Problems
Find fourth proportional to 128.29, 192.45 and 37.00
Half scale
Find fourth proportional to 513.14, 769.78 and 147.98
Double scale
Find fourth proportional to 257.57, 386.39 and 74.99
Similar ratio
Find fourth proportional to 384.86, 577.34 and 110.99
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.