Finding the Fourth Proportional to 1,278,501.78, 1,917,756.30 and 331,880.70
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Solution
The fourth proportional to 1,278,501.78, 1,917,756.30 and 331,880.70 is: 497,821.99
Step by Step Solution
- Step 1: Write the proportion equation
1,278,501.78 : 1,917,756.30 = 331,880.70 : x - Step 2: Convert to fraction form
1,278,501.78/1,917,756.30 = 331,880.70/x - Step 3: Cross multiply
1,278,501.78x = 1,917,756.30 × 331,880.70 - Step 4: Simplify right side
1,278,501.78x = 636,466,303,273.41 - Step 5: Solve for x
x = 636,466,303,273.41/1,278,501.78 - Step 6: Final answer
x = 497,821.99
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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.