Finding the Third Proportional to 978 and 1,056
Calculator
Solution
The third proportional to 978 and 1,056 is: 1,140.22
Step by Step Solution
- Step 1: Write the proportion equation
978 : 1,056 = 1,056 : x - Step 2: Convert to fraction form
978/1,056 = 1,056/x - Step 3: Cross multiply
978x = 1,056 × 1,056 - Step 4: Simplify right side
978x = 1,115,136 - Step 5: Solve for x
x = 1,115,136/978 - Step 6: Final answer
x = 1,140.22
Related Problems
Find third proportional to 489 and 528
Half scale
Find third proportional to 1,956 and 2,112
Double scale
Find third proportional to 980 and 1,058
Similar ratio
Find third proportional to 1,467 and 1,584
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.08) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.