Finding the Fourth Proportional to 644,757.21, 889,724.25 and 358,260.21
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Solution
The fourth proportional to 644,757.21, 889,724.25 and 358,260.21 is: 494,376.47
Step by Step Solution
- Step 1: Write the proportion equation
644,757.21 : 889,724.25 = 358,260.21 : x - Step 2: Convert to fraction form
644,757.21/889,724.25 = 358,260.21/x - Step 3: Cross multiply
644,757.21x = 889,724.25 × 358,260.21 - Step 4: Simplify right side
644,757.21x = 318,752,796,647.09 - Step 5: Solve for x
x = 318,752,796,647.09/644,757.21 - Step 6: Final answer
x = 494,376.47
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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.