Finding the Fourth Proportional to 1,278,312.12, 1,917,470.91 and 519,618.12
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Solution
The fourth proportional to 1,278,312.12, 1,917,470.91 and 519,618.12 is: 779,428.29
Step by Step Solution
- Step 1: Write the proportion equation
1,278,312.12 : 1,917,470.91 = 519,618.12 : x - Step 2: Convert to fraction form
1,278,312.12/1,917,470.91 = 519,618.12/x - Step 3: Cross multiply
1,278,312.12x = 1,917,470.91 × 519,618.12 - Step 4: Simplify right side
1,278,312.12x = 996,352,629,408.89 - Step 5: Solve for x
x = 996,352,629,408.89/1,278,312.12 - Step 6: Final answer
x = 779,428.29
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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.