Finding the Fourth Proportional to 828,961.80, 1,243,442.70 and 815,137.80
Calculator
Solution
The fourth proportional to 828,961.80, 1,243,442.70 and 815,137.80 is: 1,222,706.70
Step by Step Solution
- Step 1: Write the proportion equation
828,961.80 : 1,243,442.70 = 815,137.80 : x - Step 2: Convert to fraction form
828,961.80/1,243,442.70 = 815,137.80/x - Step 3: Cross multiply
828,961.80x = 1,243,442.70 × 815,137.80 - Step 4: Simplify right side
828,961.80x = 1,013,577,146,904.06 - Step 5: Solve for x
x = 1,013,577,146,904.06/828,961.80 - Step 6: Final answer
x = 1,222,706.70
Related Problems
Find fourth proportional to 414,480.90, 621,721.35 and 407,568.90
Half scale
Find fourth proportional to 1,657,923.60, 2,486,885.40 and 1,630,275.60
Double scale
Find fourth proportional to 828,962.80, 1,243,444.20 and 815,138.80
Similar ratio
Find fourth proportional to 1,243,442.70, 1,865,164.05 and 1,222,706.70
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.