Finding the Fourth Proportional to 813,983.20, 1,122,002.22 and 641,621.68
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Solution
The fourth proportional to 813,983.20, 1,122,002.22 and 641,621.68 is: 884,417.45
Step by Step Solution
- Step 1: Write the proportion equation
813,983.20 : 1,122,002.22 = 641,621.68 : x - Step 2: Convert to fraction form
813,983.20/1,122,002.22 = 641,621.68/x - Step 3: Cross multiply
813,983.20x = 1,122,002.22 × 641,621.68 - Step 4: Simplify right side
813,983.20x = 719,900,949,360.13 - Step 5: Solve for x
x = 719,900,949,360.13/813,983.20 - Step 6: Final answer
x = 884,417.45
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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.