Finding the Third Proportional to 279 and 623
Calculator
Solution
The third proportional to 279 and 623 is: 1,391.14
Step by Step Solution
- Step 1: Write the proportion equation
279 : 623 = 623 : x - Step 2: Convert to fraction form
279/623 = 623/x - Step 3: Cross multiply
279x = 623 × 623 - Step 4: Simplify right side
279x = 388,129 - Step 5: Solve for x
x = 388,129/279 - Step 6: Final answer
x = 1,391.14
Related Problems
Find third proportional to 139.50 and 311.50
Half scale
Find third proportional to 558 and 1,246
Double scale
Find third proportional to 281 and 627
Similar ratio
Find third proportional to 418.50 and 934.50
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (2.23) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.