Finding the Fourth Proportional to 512,375.68, 768,561.84 and 138,398.80
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Solution
The fourth proportional to 512,375.68, 768,561.84 and 138,398.80 is: 207,597.75
Step by Step Solution
- Step 1: Write the proportion equation
512,375.68 : 768,561.84 = 138,398.80 : x - Step 2: Convert to fraction form
512,375.68/768,561.84 = 138,398.80/x - Step 3: Cross multiply
512,375.68x = 768,561.84 × 138,398.80 - Step 4: Simplify right side
512,375.68x = 106,368,036,381.79 - Step 5: Solve for x
x = 106,368,036,381.79/512,375.68 - Step 6: Final answer
x = 207,597.75
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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.