Finding the Fourth Proportional to 511,139.97, 705,378.11 and 281,705.65
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Solution
The fourth proportional to 511,139.97, 705,378.11 and 281,705.65 is: 388,756.52
Step by Step Solution
- Step 1: Write the proportion equation
511,139.97 : 705,378.11 = 281,705.65 : x - Step 2: Convert to fraction form
511,139.97/705,378.11 = 281,705.65/x - Step 3: Cross multiply
511,139.97x = 705,378.11 × 281,705.65 - Step 4: Simplify right side
511,139.97x = 198,708,995,801.35 - Step 5: Solve for x
x = 198,708,995,801.35/511,139.97 - Step 6: Final answer
x = 388,756.52
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1.5x scale
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.