Finding the Fourth Proportional to 509,408.74, 702,988.29 and 318,532.78
Calculator
Solution
The fourth proportional to 509,408.74, 702,988.29 and 318,532.78 is: 439,577.88
Step by Step Solution
- Step 1: Write the proportion equation
509,408.74 : 702,988.29 = 318,532.78 : x - Step 2: Convert to fraction form
509,408.74/702,988.29 = 318,532.78/x - Step 3: Cross multiply
509,408.74x = 702,988.29 × 318,532.78 - Step 4: Simplify right side
509,408.74x = 223,924,814,321.15 - Step 5: Solve for x
x = 223,924,814,321.15/509,408.74 - Step 6: Final answer
x = 439,577.88
Related Problems
Find fourth proportional to 254,704.37, 351,494.15 and 159,266.39
Half scale
Find fourth proportional to 1,018,817.48, 1,405,976.58 and 637,065.56
Double scale
Find fourth proportional to 509,409.74, 702,989.67 and 318,533.78
Similar ratio
Find fourth proportional to 764,113.11, 1,054,482.44 and 477,799.17
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.