Finding the Fourth Proportional to 715,791.87, 987,811.63 and 393,510.08
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Solution
The fourth proportional to 715,791.87, 987,811.63 and 393,510.08 is: 543,054.28
Step by Step Solution
- Step 1: Write the proportion equation
715,791.87 : 987,811.63 = 393,510.08 : x - Step 2: Convert to fraction form
715,791.87/987,811.63 = 393,510.08/x - Step 3: Cross multiply
715,791.87x = 987,811.63 × 393,510.08 - Step 4: Simplify right side
715,791.87x = 388,713,835,031.98 - Step 5: Solve for x
x = 388,713,835,031.98/715,791.87 - Step 6: Final answer
x = 543,054.28
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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.