Finding the Fourth Proportional to 455,853.76, 628,815.12 and 274,439.68
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Solution
The fourth proportional to 455,853.76, 628,815.12 and 274,439.68 is: 378,568.38
Step by Step Solution
- Step 1: Write the proportion equation
455,853.76 : 628,815.12 = 274,439.68 : x - Step 2: Convert to fraction form
455,853.76/628,815.12 = 274,439.68/x - Step 3: Cross multiply
455,853.76x = 628,815.12 × 274,439.68 - Step 4: Simplify right side
455,853.76x = 172,571,820,311.96 - Step 5: Solve for x
x = 172,571,820,311.96/455,853.76 - Step 6: Final answer
x = 378,568.38
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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.