Finding the Fourth Proportional to 678,772.28, 936,651.12 and 392,310.92
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Solution
The fourth proportional to 678,772.28, 936,651.12 and 392,310.92 is: 541,357.50
Step by Step Solution
- Step 1: Write the proportion equation
678,772.28 : 936,651.12 = 392,310.92 : x - Step 2: Convert to fraction form
678,772.28/936,651.12 = 392,310.92/x - Step 3: Cross multiply
678,772.28x = 936,651.12 × 392,310.92 - Step 4: Simplify right side
678,772.28x = 367,458,462,606.23 - Step 5: Solve for x
x = 367,458,462,606.23/678,772.28 - Step 6: Final answer
x = 541,357.50
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1.5x scale
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.