Finding the Fourth Proportional to 715,863.28, 987,898.08 and 393,575.62
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Solution
The fourth proportional to 715,863.28, 987,898.08 and 393,575.62 is: 543,138.07
Step by Step Solution
- Step 1: Write the proportion equation
715,863.28 : 987,898.08 = 393,575.62 : x - Step 2: Convert to fraction form
715,863.28/987,898.08 = 393,575.62/x - Step 3: Cross multiply
715,863.28x = 987,898.08 × 393,575.62 - Step 4: Simplify right side
715,863.28x = 388,812,599,332.81 - Step 5: Solve for x
x = 388,812,599,332.81/715,863.28 - Step 6: Final answer
x = 543,138.07
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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.