Finding the Fourth Proportional to 715,378.74, 987,222.38 and 393,109.62
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Solution
The fourth proportional to 715,378.74, 987,222.38 and 393,109.62 is: 542,491.12
Step by Step Solution
- Step 1: Write the proportion equation
715,378.74 : 987,222.38 = 393,109.62 : x - Step 2: Convert to fraction form
715,378.74/987,222.38 = 393,109.62/x - Step 3: Cross multiply
715,378.74x = 987,222.38 × 393,109.62 - Step 4: Simplify right side
715,378.74x = 388,086,614,657.30 - Step 5: Solve for x
x = 388,086,614,657.30/715,378.74 - Step 6: Final answer
x = 542,491.12
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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.