Finding the Fourth Proportional to 279.92, 420.64 and 272.63
Calculator
Solution
The fourth proportional to 279.92, 420.64 and 272.63 is: 409.69
Step by Step Solution
- Step 1: Write the proportion equation
279.92 : 420.64 = 272.63 : x - Step 2: Convert to fraction form
279.92/420.64 = 272.63/x - Step 3: Cross multiply
279.92x = 420.64 × 272.63 - Step 4: Simplify right side
279.92x = 114,680.99 - Step 5: Solve for x
x = 114,680.99/279.92 - Step 6: Final answer
x = 409.69
Related Problems
Find fourth proportional to 139.96, 210.32 and 136.32
Half scale
Find fourth proportional to 559.85, 841.29 and 545.27
Double scale
Find fourth proportional to 280.92, 422.15 and 273.63
Similar ratio
Find fourth proportional to 419.88, 630.96 and 408.95
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.