Finding the Fourth Proportional to 694,315.42, 1,040,128.05 and 393,887.20
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Solution
The fourth proportional to 694,315.42, 1,040,128.05 and 393,887.20 is: 590,067.73
Step by Step Solution
- Step 1: Write the proportion equation
694,315.42 : 1,040,128.05 = 393,887.20 : x - Step 2: Convert to fraction form
694,315.42/1,040,128.05 = 393,887.20/x - Step 3: Cross multiply
694,315.42x = 1,040,128.05 × 393,887.20 - Step 4: Simplify right side
694,315.42x = 409,693,125,255.96 - Step 5: Solve for x
x = 409,693,125,255.96/694,315.42 - Step 6: Final answer
x = 590,067.73
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.