Finding the Fourth Proportional to 643,698.68, 888,213.48 and 385,515.12
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Solution
The fourth proportional to 643,698.68, 888,213.48 and 385,515.12 is: 531,956.55
Step by Step Solution
- Step 1: Write the proportion equation
643,698.68 : 888,213.48 = 385,515.12 : x - Step 2: Convert to fraction form
643,698.68/888,213.48 = 385,515.12/x - Step 3: Cross multiply
643,698.68x = 888,213.48 × 385,515.12 - Step 4: Simplify right side
643,698.68x = 342,419,726,327.82 - Step 5: Solve for x
x = 342,419,726,327.82/643,698.68 - Step 6: Final answer
x = 531,956.55
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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.