Finding the Fourth Proportional to 830,136.11, 1,245,204.50 and 640,872.80
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Solution
The fourth proportional to 830,136.11, 1,245,204.50 and 640,872.80 is: 961,309.45
Step by Step Solution
- Step 1: Write the proportion equation
830,136.11 : 1,245,204.50 = 640,872.80 : x - Step 2: Convert to fraction form
830,136.11/1,245,204.50 = 640,872.80/x - Step 3: Cross multiply
830,136.11x = 1,245,204.50 × 640,872.80 - Step 4: Simplify right side
830,136.11x = 798,017,685,057.21 - Step 5: Solve for x
x = 798,017,685,057.21/830,136.11 - Step 6: Final answer
x = 961,309.45
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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.