Finding the Fourth Proportional to 715,376.75, 987,219.63 and 393,107.63
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Solution
The fourth proportional to 715,376.75, 987,219.63 and 393,107.63 is: 542,488.37
Step by Step Solution
- Step 1: Write the proportion equation
715,376.75 : 987,219.63 = 393,107.63 : x - Step 2: Convert to fraction form
715,376.75/987,219.63 = 393,107.63/x - Step 3: Cross multiply
715,376.75x = 987,219.63 × 393,107.63 - Step 4: Simplify right side
715,376.75x = 388,083,564,102.68 - Step 5: Solve for x
x = 388,083,564,102.68/715,376.75 - Step 6: Final answer
x = 542,488.37
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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.