Finding the Fourth Proportional to 399,602.80, 550,329.24 and 390,893.68
Calculator
Solution
The fourth proportional to 399,602.80, 550,329.24 and 390,893.68 is: 538,335.12
Step by Step Solution
- Step 1: Write the proportion equation
399,602.80 : 550,329.24 = 390,893.68 : x - Step 2: Convert to fraction form
399,602.80/550,329.24 = 390,893.68/x - Step 3: Cross multiply
399,602.80x = 550,329.24 × 390,893.68 - Step 4: Simplify right side
399,602.80x = 215,120,221,835.20 - Step 5: Solve for x
x = 215,120,221,835.20/399,602.80 - Step 6: Final answer
x = 538,335.12
Related Problems
Find fourth proportional to 199,801.40, 275,164.62 and 195,446.84
Half scale
Find fourth proportional to 799,205.60, 1,100,658.48 and 781,787.36
Double scale
Find fourth proportional to 399,603.80, 550,330.62 and 390,894.68
Similar ratio
Find fourth proportional to 599,404.20, 825,493.86 and 586,340.52
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.