Finding the Fourth Proportional to 877,612.20, 1,316,418.30 and 428,621.10
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Solution
The fourth proportional to 877,612.20, 1,316,418.30 and 428,621.10 is: 642,931.65
Step by Step Solution
- Step 1: Write the proportion equation
877,612.20 : 1,316,418.30 = 428,621.10 : x - Step 2: Convert to fraction form
877,612.20/1,316,418.30 = 428,621.10/x - Step 3: Cross multiply
877,612.20x = 1,316,418.30 × 428,621.10 - Step 4: Simplify right side
877,612.20x = 564,244,659,806.13 - Step 5: Solve for x
x = 564,244,659,806.13/877,612.20 - Step 6: Final answer
x = 642,931.65
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.