Finding the Fourth Proportional to 1,278,315.12, 1,917,475.41 and 519,621.12
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Solution
The fourth proportional to 1,278,315.12, 1,917,475.41 and 519,621.12 is: 779,432.79
Step by Step Solution
- Step 1: Write the proportion equation
1,278,315.12 : 1,917,475.41 = 519,621.12 : x - Step 2: Convert to fraction form
1,278,315.12/1,917,475.41 = 519,621.12/x - Step 3: Cross multiply
1,278,315.12x = 1,917,475.41 × 519,621.12 - Step 4: Simplify right side
1,278,315.12x = 996,360,720,116.66 - Step 5: Solve for x
x = 996,360,720,116.66/1,278,315.12 - Step 6: Final answer
x = 779,432.79
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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.