Finding the Fourth Proportional to 493,983.70, 681,446.70 and 312,389.80
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Solution
The fourth proportional to 493,983.70, 681,446.70 and 312,389.80 is: 430,939.32
Step by Step Solution
- Step 1: Write the proportion equation
493,983.70 : 681,446.70 = 312,389.80 : x - Step 2: Convert to fraction form
493,983.70/681,446.70 = 312,389.80/x - Step 3: Cross multiply
493,983.70x = 681,446.70 × 312,389.80 - Step 4: Simplify right side
493,983.70x = 212,876,998,323.66 - Step 5: Solve for x
x = 212,876,998,323.66/493,983.70 - Step 6: Final answer
x = 430,939.32
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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.