Finding the Fourth Proportional to 403.68, 555.84 and 356.88
Calculator
Solution
The fourth proportional to 403.68, 555.84 and 356.88 is: 491.40
Step by Step Solution
- Step 1: Write the proportion equation
403.68 : 555.84 = 356.88 : x - Step 2: Convert to fraction form
403.68/555.84 = 356.88/x - Step 3: Cross multiply
403.68x = 555.84 × 356.88 - Step 4: Simplify right side
403.68x = 198,368.18 - Step 5: Solve for x
x = 198,368.18/403.68 - Step 6: Final answer
x = 491.40
Related Problems
Find fourth proportional to 201.84, 277.92 and 178.44
Half scale
Find fourth proportional to 807.36, 1,111.68 and 713.76
Double scale
Find fourth proportional to 404.68, 557.22 and 357.88
Similar ratio
Find fourth proportional to 605.52, 833.76 and 535.32
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.