Finding the Fourth Proportional to 387,278.20, 580,742.34 and 137,966.68
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Solution
The fourth proportional to 387,278.20, 580,742.34 and 137,966.68 is: 206,887.69
Step by Step Solution
- Step 1: Write the proportion equation
387,278.20 : 580,742.34 = 137,966.68 : x - Step 2: Convert to fraction form
387,278.20/580,742.34 = 137,966.68/x - Step 3: Cross multiply
387,278.20x = 580,742.34 × 137,966.68 - Step 4: Simplify right side
387,278.20x = 80,123,092,585.23 - Step 5: Solve for x
x = 80,123,092,585.23/387,278.20 - Step 6: Final answer
x = 206,887.69
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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.