Finding the Fourth Proportional to 612,721.80, 919,082.70 and 455,257.80
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Solution
The fourth proportional to 612,721.80, 919,082.70 and 455,257.80 is: 682,886.70
Step by Step Solution
- Step 1: Write the proportion equation
612,721.80 : 919,082.70 = 455,257.80 : x - Step 2: Convert to fraction form
612,721.80/919,082.70 = 455,257.80/x - Step 3: Cross multiply
612,721.80x = 919,082.70 × 455,257.80 - Step 4: Simplify right side
612,721.80x = 418,419,568,020.06 - Step 5: Solve for x
x = 418,419,568,020.06/612,721.80 - Step 6: Final answer
x = 682,886.70
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1.5x scale
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.