Finding the Fourth Proportional to 715,393.54, 987,242.70 and 393,124.42
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Solution
The fourth proportional to 715,393.54, 987,242.70 and 393,124.42 is: 542,511.49
Step by Step Solution
- Step 1: Write the proportion equation
715,393.54 : 987,242.70 = 393,124.42 : x - Step 2: Convert to fraction form
715,393.54/987,242.70 = 393,124.42/x - Step 3: Cross multiply
715,393.54x = 987,242.70 × 393,124.42 - Step 4: Simplify right side
715,393.54x = 388,109,213,836.73 - Step 5: Solve for x
x = 388,109,213,836.73/715,393.54 - Step 6: Final answer
x = 542,511.49
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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.