Finding the Fourth Proportional to 879,537.12, 1,213,763.56 and 477,129.12
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Solution
The fourth proportional to 879,537.12, 1,213,763.56 and 477,129.12 is: 658,439.45
Step by Step Solution
- Step 1: Write the proportion equation
879,537.12 : 1,213,763.56 = 477,129.12 : x - Step 2: Convert to fraction form
879,537.12/1,213,763.56 = 477,129.12/x - Step 3: Cross multiply
879,537.12x = 1,213,763.56 × 477,129.12 - Step 4: Simplify right side
879,537.12x = 579,121,939,270.87 - Step 5: Solve for x
x = 579,121,939,270.87/879,537.12 - Step 6: Final answer
x = 658,439.45
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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.