Finding the Fourth Proportional to 431,147,113.20, 646,720,669.80 and 236,958,571.80
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Solution
The fourth proportional to 431,147,113.20, 646,720,669.80 and 236,958,571.80 is: 355,437,857.70
Step by Step Solution
- Step 1: Write the proportion equation
431,147,113.20 : 646,720,669.80 = 236,958,571.80 : x - Step 2: Convert to fraction form
431,147,113.20/646,720,669.80 = 236,958,571.80/x - Step 3: Cross multiply
431,147,113.20x = 646,720,669.80 × 236,958,571.80 - Step 4: Simplify right side
431,147,113.20x = 153,246,006,269,347,392 - Step 5: Solve for x
x = 153,246,006,269,347,392/431,147,113.20 - Step 6: Final answer
x = 355,437,857.70
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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.