Finding the Fourth Proportional to 389,724.60, 584,295.30 and 212,431.80
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Solution
The fourth proportional to 389,724.60, 584,295.30 and 212,431.80 is: 318,488.75
Step by Step Solution
- Step 1: Write the proportion equation
389,724.60 : 584,295.30 = 212,431.80 : x - Step 2: Convert to fraction form
389,724.60/584,295.30 = 212,431.80/x - Step 3: Cross multiply
389,724.60x = 584,295.30 × 212,431.80 - Step 4: Simplify right side
389,724.60x = 124,122,902,310.54 - Step 5: Solve for x
x = 124,122,902,310.54/389,724.60 - Step 6: Final answer
x = 318,488.75
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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.