Finding the Fourth Proportional to 678,873.62, 936,741.56 and 392,338.41
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Solution
The fourth proportional to 678,873.62, 936,741.56 and 392,338.41 is: 541,366.88
Step by Step Solution
- Step 1: Write the proportion equation
678,873.62 : 936,741.56 = 392,338.41 : x - Step 2: Convert to fraction form
678,873.62/936,741.56 = 392,338.41/x - Step 3: Cross multiply
678,873.62x = 936,741.56 × 392,338.41 - Step 4: Simplify right side
678,873.62x = 367,519,692,269.63 - Step 5: Solve for x
x = 367,519,692,269.63/678,873.62 - Step 6: Final answer
x = 541,366.88
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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.