Finding the Fourth Proportional to 389,805.75, 537,931.94 and 210,957.75
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Solution
The fourth proportional to 389,805.75, 537,931.94 and 210,957.75 is: 291,121.70
Step by Step Solution
- Step 1: Write the proportion equation
389,805.75 : 537,931.94 = 210,957.75 : x - Step 2: Convert to fraction form
389,805.75/537,931.94 = 210,957.75/x - Step 3: Cross multiply
389,805.75x = 537,931.94 × 210,957.75 - Step 4: Simplify right side
389,805.75x = 113,480,910,660.75 - Step 5: Solve for x
x = 113,480,910,660.75/389,805.75 - Step 6: Final answer
x = 291,121.70
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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.