Finding the Fourth Proportional to 715,873.92, 987,885.12 and 393,583.68
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Solution
The fourth proportional to 715,873.92, 987,885.12 and 393,583.68 is: 543,133.99
Step by Step Solution
- Step 1: Write the proportion equation
715,873.92 : 987,885.12 = 393,583.68 : x - Step 2: Convert to fraction form
715,873.92/987,885.12 = 393,583.68/x - Step 3: Cross multiply
715,873.92x = 987,885.12 × 393,583.68 - Step 4: Simplify right side
715,873.92x = 388,815,460,946.84 - Step 5: Solve for x
x = 388,815,460,946.84/715,873.92 - Step 6: Final answer
x = 543,133.99
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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.