Finding the Fourth Proportional to 1,272,321.60, 1,908,481.20 and 325,690.80
Calculator
Solution
The fourth proportional to 1,272,321.60, 1,908,481.20 and 325,690.80 is: 488,535.89
Step by Step Solution
- Step 1: Write the proportion equation
1,272,321.60 : 1,908,481.20 = 325,690.80 : x - Step 2: Convert to fraction form
1,272,321.60/1,908,481.20 = 325,690.80/x - Step 3: Cross multiply
1,272,321.60x = 1,908,481.20 × 325,690.80 - Step 4: Simplify right side
1,272,321.60x = 621,574,768,812.96 - Step 5: Solve for x
x = 621,574,768,812.96/1,272,321.60 - Step 6: Final answer
x = 488,535.89
Related Problems
Find fourth proportional to 636,160.80, 954,240.60 and 162,845.40
Half scale
Find fourth proportional to 2,544,643.20, 3,816,962.40 and 651,381.60
Double scale
Find fourth proportional to 1,272,322.60, 1,908,482.70 and 325,691.80
Similar ratio
Find fourth proportional to 1,908,482.40, 2,862,721.80 and 488,536.20
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.