Finding the Fourth Proportional to 838,490.12, 1,157,835.70 and 811,375.74
Calculator
Solution
The fourth proportional to 838,490.12, 1,157,835.70 and 811,375.74 is: 1,120,394.59
Step by Step Solution
- Step 1: Write the proportion equation
838,490.12 : 1,157,835.70 = 811,375.74 : x - Step 2: Convert to fraction form
838,490.12/1,157,835.70 = 811,375.74/x - Step 3: Cross multiply
838,490.12x = 1,157,835.70 × 811,375.74 - Step 4: Simplify right side
838,490.12x = 939,439,797,885.92 - Step 5: Solve for x
x = 939,439,797,885.92/838,490.12 - Step 6: Final answer
x = 1,120,394.59
Related Problems
Find fourth proportional to 419,245.06, 578,917.85 and 405,687.87
Half scale
Find fourth proportional to 1,676,980.24, 2,315,671.40 and 1,622,751.48
Double scale
Find fourth proportional to 838,491.12, 1,157,837.08 and 811,376.74
Similar ratio
Find fourth proportional to 1,257,735.18, 1,736,753.55 and 1,217,063.61
1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.