Finding the Fourth Proportional to 643,701.68, 888,217.62 and 385,518.12
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Solution
The fourth proportional to 643,701.68, 888,217.62 and 385,518.12 is: 531,960.69
Step by Step Solution
- Step 1: Write the proportion equation
643,701.68 : 888,217.62 = 385,518.12 : x - Step 2: Convert to fraction form
643,701.68/888,217.62 = 385,518.12/x - Step 3: Cross multiply
643,701.68x = 888,217.62 × 385,518.12 - Step 4: Simplify right side
643,701.68x = 342,423,987,013.27 - Step 5: Solve for x
x = 342,423,987,013.27/643,701.68 - Step 6: Final answer
x = 531,960.69
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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.