Finding the Fourth Proportional to 576.30, 863.64 and 432.12
Calculator
Solution
The fourth proportional to 576.30, 863.64 and 432.12 is: 647.57
Step by Step Solution
- Step 1: Write the proportion equation
576.30 : 863.64 = 432.12 : x - Step 2: Convert to fraction form
576.30/863.64 = 432.12/x - Step 3: Cross multiply
576.30x = 863.64 × 432.12 - Step 4: Simplify right side
576.30x = 373,196.12 - Step 5: Solve for x
x = 373,196.12/576.30 - Step 6: Final answer
x = 647.57
Related Problems
Find fourth proportional to 288.15, 431.82 and 216.06
Half scale
Find fourth proportional to 1,152.60, 1,727.28 and 864.24
Double scale
Find fourth proportional to 577.30, 865.14 and 433.12
Similar ratio
Find fourth proportional to 864.45, 1,295.46 and 648.18
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.