Finding the Fourth Proportional to 1,638,203.56, 2,457,139.14 and 439,970.20
Calculator
Solution
The fourth proportional to 1,638,203.56, 2,457,139.14 and 439,970.20 is: 659,910.66
Step by Step Solution
- Step 1: Write the proportion equation
1,638,203.56 : 2,457,139.14 = 439,970.20 : x - Step 2: Convert to fraction form
1,638,203.56/2,457,139.14 = 439,970.20/x - Step 3: Cross multiply
1,638,203.56x = 2,457,139.14 × 439,970.20 - Step 4: Simplify right side
1,638,203.56x = 1,081,067,998,853.63 - Step 5: Solve for x
x = 1,081,067,998,853.63/1,638,203.56 - Step 6: Final answer
x = 659,910.66
Related Problems
Find fourth proportional to 819,101.78, 1,228,569.57 and 219,985.10
Half scale
Find fourth proportional to 3,276,407.12, 4,914,278.28 and 879,940.40
Double scale
Find fourth proportional to 1,638,204.56, 2,457,140.64 and 439,971.20
Similar ratio
Find fourth proportional to 2,457,305.34, 3,685,708.71 and 659,955.30
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.