Finding the Fourth Proportional to 879,543.12, 1,213,771.84 and 477,135.12
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Solution
The fourth proportional to 879,543.12, 1,213,771.84 and 477,135.12 is: 658,447.73
Step by Step Solution
- Step 1: Write the proportion equation
879,543.12 : 1,213,771.84 = 477,135.12 : x - Step 2: Convert to fraction form
879,543.12/1,213,771.84 = 477,135.12/x - Step 3: Cross multiply
879,543.12x = 1,213,771.84 × 477,135.12 - Step 4: Simplify right side
879,543.12x = 579,133,172,531.02 - Step 5: Solve for x
x = 579,133,172,531.02/879,543.12 - Step 6: Final answer
x = 658,447.73
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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.