Finding the Fourth Proportional to 715,296.55, 987,107.29 and 393,013.75
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Solution
The fourth proportional to 715,296.55, 987,107.29 and 393,013.75 is: 542,357.90
Step by Step Solution
- Step 1: Write the proportion equation
715,296.55 : 987,107.29 = 393,013.75 : x - Step 2: Convert to fraction form
715,296.55/987,107.29 = 393,013.75/x - Step 3: Cross multiply
715,296.55x = 987,107.29 × 393,013.75 - Step 4: Simplify right side
715,296.55x = 387,946,737,695.24 - Step 5: Solve for x
x = 387,946,737,695.24/715,296.55 - Step 6: Final answer
x = 542,357.90
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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.