Finding the Fourth Proportional to 1,138,749.12, 1,571,412.42 and 629,421.12
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Solution
The fourth proportional to 1,138,749.12, 1,571,412.42 and 629,421.12 is: 868,567.23
Step by Step Solution
- Step 1: Write the proportion equation
1,138,749.12 : 1,571,412.42 = 629,421.12 : x - Step 2: Convert to fraction form
1,138,749.12/1,571,412.42 = 629,421.12/x - Step 3: Cross multiply
1,138,749.12x = 1,571,412.42 × 629,421.12 - Step 4: Simplify right side
1,138,749.12x = 989,080,165,378.31 - Step 5: Solve for x
x = 989,080,165,378.31/1,138,749.12 - Step 6: Final answer
x = 868,567.23
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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.