Finding the Fourth Proportional to 1,278,889.48, 1,917,918.88 and 425,731.96
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Solution
The fourth proportional to 1,278,889.48, 1,917,918.88 and 425,731.96 is: 638,459.68
Step by Step Solution
- Step 1: Write the proportion equation
1,278,889.48 : 1,917,918.88 = 425,731.96 : x - Step 2: Convert to fraction form
1,278,889.48/1,917,918.88 = 425,731.96/x - Step 3: Cross multiply
1,278,889.48x = 1,917,918.88 × 425,731.96 - Step 4: Simplify right side
1,278,889.48x = 816,519,363,903.41 - Step 5: Solve for x
x = 816,519,363,903.41/1,278,889.48 - Step 6: Final answer
x = 638,459.68
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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.