Finding the Fourth Proportional to 715,382.74, 987,227.90 and 393,113.62
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Solution
The fourth proportional to 715,382.74, 987,227.90 and 393,113.62 is: 542,496.64
Step by Step Solution
- Step 1: Write the proportion equation
715,382.74 : 987,227.90 = 393,113.62 : x - Step 2: Convert to fraction form
715,382.74/987,227.90 = 393,113.62/x - Step 3: Cross multiply
715,382.74x = 987,227.90 × 393,113.62 - Step 4: Simplify right side
715,382.74x = 388,092,733,534.00 - Step 5: Solve for x
x = 388,092,733,534.00/715,382.74 - Step 6: Final answer
x = 542,496.64
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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.