Finding the Fourth Proportional to 512,492.80, 768,739.20 and 138,515.80
Calculator
Solution
The fourth proportional to 512,492.80, 768,739.20 and 138,515.80 is: 207,773.70
Step by Step Solution
- Step 1: Write the proportion equation
512,492.80 : 768,739.20 = 138,515.80 : x - Step 2: Convert to fraction form
512,492.80/768,739.20 = 138,515.80/x - Step 3: Cross multiply
512,492.80x = 768,739.20 × 138,515.80 - Step 4: Simplify right side
512,492.80x = 106,482,525,279.36 - Step 5: Solve for x
x = 106,482,525,279.36/512,492.80 - Step 6: Final answer
x = 207,773.70
Related Problems
Find fourth proportional to 256,246.40, 384,369.60 and 69,257.90
Half scale
Find fourth proportional to 1,024,985.60, 1,537,478.40 and 277,031.60
Double scale
Find fourth proportional to 512,493.80, 768,740.70 and 138,516.80
Similar ratio
Find fourth proportional to 768,739.20, 1,153,108.80 and 207,773.70
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.