Finding the Fourth Proportional to 779,311.40, 1,071,321.36 and 670,013.09
Calculator
Solution
The fourth proportional to 779,311.40, 1,071,321.36 and 670,013.09 is: 921,068.70
Step by Step Solution
- Step 1: Write the proportion equation
779,311.40 : 1,071,321.36 = 670,013.09 : x - Step 2: Convert to fraction form
779,311.40/1,071,321.36 = 670,013.09/x - Step 3: Cross multiply
779,311.40x = 1,071,321.36 × 670,013.09 - Step 4: Simplify right side
779,311.40x = 717,799,334,796.60 - Step 5: Solve for x
x = 717,799,334,796.60/779,311.40 - Step 6: Final answer
x = 921,068.70
Related Problems
Find fourth proportional to 389,655.70, 535,660.68 and 335,006.55
Half scale
Find fourth proportional to 1,558,622.80, 2,142,642.72 and 1,340,026.18
Double scale
Find fourth proportional to 779,312.40, 1,071,322.73 and 670,014.09
Similar ratio
Find fourth proportional to 1,168,967.10, 1,606,982.04 and 1,005,019.64
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.