Finding the Fourth Proportional to 647,680.21, 893,493.65 and 421,243.09
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Solution
The fourth proportional to 647,680.21, 893,493.65 and 421,243.09 is: 581,117.07
Step by Step Solution
- Step 1: Write the proportion equation
647,680.21 : 893,493.65 = 421,243.09 : x - Step 2: Convert to fraction form
647,680.21/893,493.65 = 421,243.09/x - Step 3: Cross multiply
647,680.21x = 893,493.65 × 421,243.09 - Step 4: Simplify right side
647,680.21x = 376,378,023,915.16 - Step 5: Solve for x
x = 376,378,023,915.16/647,680.21 - Step 6: Final answer
x = 581,117.07
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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.