Finding the Fourth Proportional to 492,757.20, 739,135.80 and 212,821.20
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Solution
The fourth proportional to 492,757.20, 739,135.80 and 212,821.20 is: 319,231.80
Step by Step Solution
- Step 1: Write the proportion equation
492,757.20 : 739,135.80 = 212,821.20 : x - Step 2: Convert to fraction form
492,757.20/739,135.80 = 212,821.20/x - Step 3: Cross multiply
492,757.20x = 739,135.80 × 212,821.20 - Step 4: Simplify right side
492,757.20x = 157,303,767,918.96 - Step 5: Solve for x
x = 157,303,767,918.96/492,757.20 - Step 6: Final answer
x = 319,231.80
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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.