Finding the Fourth Proportional to 310,438.58, 428,510.13 and 201,691.70
Calculator
Solution
The fourth proportional to 310,438.58, 428,510.13 and 201,691.70 is: 278,402.69
Step by Step Solution
- Step 1: Write the proportion equation
310,438.58 : 428,510.13 = 201,691.70 : x - Step 2: Convert to fraction form
310,438.58/428,510.13 = 201,691.70/x - Step 3: Cross multiply
310,438.58x = 428,510.13 × 201,691.70 - Step 4: Simplify right side
310,438.58x = 86,426,936,586.92 - Step 5: Solve for x
x = 86,426,936,586.92/310,438.58 - Step 6: Final answer
x = 278,402.69
Related Problems
Find fourth proportional to 155,219.29, 214,255.07 and 100,845.85
Half scale
Find fourth proportional to 620,877.16, 857,020.26 and 403,383.40
Double scale
Find fourth proportional to 310,439.58, 428,511.51 and 201,692.70
Similar ratio
Find fourth proportional to 465,657.87, 642,765.20 and 302,537.55
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.