Finding the Fourth Proportional to 780,121.68, 1,076,589.16 and 440,640.40
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Solution
The fourth proportional to 780,121.68, 1,076,589.16 and 440,640.40 is: 608,095.75
Step by Step Solution
- Step 1: Write the proportion equation
780,121.68 : 1,076,589.16 = 440,640.40 : x - Step 2: Convert to fraction form
780,121.68/1,076,589.16 = 440,640.40/x - Step 3: Cross multiply
780,121.68x = 1,076,589.16 × 440,640.40 - Step 4: Simplify right side
780,121.68x = 474,388,678,098.06 - Step 5: Solve for x
x = 474,388,678,098.06/780,121.68 - Step 6: Final answer
x = 608,095.75
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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.