Finding the Fourth Proportional to 782,407, 1,079,748.20 and 438,257.68
Calculator
Solution
The fourth proportional to 782,407, 1,079,748.20 and 438,257.68 is: 604,810.46
Step by Step Solution
- Step 1: Write the proportion equation
782,407 : 1,079,748.20 = 438,257.68 : x - Step 2: Convert to fraction form
782,407/1,079,748.20 = 438,257.68/x - Step 3: Cross multiply
782,407x = 1,079,748.20 × 438,257.68 - Step 4: Simplify right side
782,407x = 473,207,941,116.18 - Step 5: Solve for x
x = 473,207,941,116.18/782,407 - Step 6: Final answer
x = 604,810.46
Related Problems
Find fourth proportional to 391,203.50, 539,874.10 and 219,128.84
Half scale
Find fourth proportional to 1,564,814, 2,159,496.40 and 876,515.36
Double scale
Find fourth proportional to 782,408, 1,079,749.58 and 438,258.68
Similar ratio
Find fourth proportional to 1,173,610.50, 1,619,622.30 and 657,386.52
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.