Finding the Fourth Proportional to 715,862.28, 987,896.70 and 393,574.62
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Solution
The fourth proportional to 715,862.28, 987,896.70 and 393,574.62 is: 543,136.69
Step by Step Solution
- Step 1: Write the proportion equation
715,862.28 : 987,896.70 = 393,574.62 : x - Step 2: Convert to fraction form
715,862.28/987,896.70 = 393,574.62/x - Step 3: Cross multiply
715,862.28x = 987,896.70 × 393,574.62 - Step 4: Simplify right side
715,862.28x = 388,811,068,301.75 - Step 5: Solve for x
x = 388,811,068,301.75/715,862.28 - Step 6: Final answer
x = 543,136.69
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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.