Finding the Fourth Proportional to 715,675.78, 987,621.19 and 393,378.94
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Solution
The fourth proportional to 715,675.78, 987,621.19 and 393,378.94 is: 542,856.68
Step by Step Solution
- Step 1: Write the proportion equation
715,675.78 : 987,621.19 = 393,378.94 : x - Step 2: Convert to fraction form
715,675.78/987,621.19 = 393,378.94/x - Step 3: Cross multiply
715,675.78x = 987,621.19 × 393,378.94 - Step 4: Simplify right side
715,675.78x = 388,509,376,843.74 - Step 5: Solve for x
x = 388,509,376,843.74/715,675.78 - Step 6: Final answer
x = 542,856.68
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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.