Finding the Fourth Proportional to 717,198.17, 989,755.25 and 394,919.80
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Solution
The fourth proportional to 717,198.17, 989,755.25 and 394,919.80 is: 545,001.31
Step by Step Solution
- Step 1: Write the proportion equation
717,198.17 : 989,755.25 = 394,919.80 : x - Step 2: Convert to fraction form
717,198.17/989,755.25 = 394,919.80/x - Step 3: Cross multiply
717,198.17x = 989,755.25 × 394,919.80 - Step 4: Simplify right side
717,198.17x = 390,873,940,929.96 - Step 5: Solve for x
x = 390,873,940,929.96/717,198.17 - Step 6: Final answer
x = 545,001.31
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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.