Finding the Fourth Proportional to 715,725.87, 987,713.97 and 393,449.55
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Solution
The fourth proportional to 715,725.87, 987,713.97 and 393,449.55 is: 542,967.12
Step by Step Solution
- Step 1: Write the proportion equation
715,725.87 : 987,713.97 = 393,449.55 : x - Step 2: Convert to fraction form
715,725.87/987,713.97 = 393,449.55/x - Step 3: Cross multiply
715,725.87x = 987,713.97 × 393,449.55 - Step 4: Simplify right side
715,725.87x = 388,615,617,025.21 - Step 5: Solve for x
x = 388,615,617,025.21/715,725.87 - Step 6: Final answer
x = 542,967.12
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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.