Finding the Fourth Proportional to 678,772.35, 936,651.21 and 392,310.99
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Solution
The fourth proportional to 678,772.35, 936,651.21 and 392,310.99 is: 541,357.59
Step by Step Solution
- Step 1: Write the proportion equation
678,772.35 : 936,651.21 = 392,310.99 : x - Step 2: Convert to fraction form
678,772.35/936,651.21 = 392,310.99/x - Step 3: Cross multiply
678,772.35x = 936,651.21 × 392,310.99 - Step 4: Simplify right side
678,772.35x = 367,458,563,479.80 - Step 5: Solve for x
x = 367,458,563,479.80/678,772.35 - Step 6: Final answer
x = 541,357.59
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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.