Finding the Fourth Proportional to 1,280,829.20, 1,921,243.80 and 394,365.20
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Solution
The fourth proportional to 1,280,829.20, 1,921,243.80 and 394,365.20 is: 591,547.80
Step by Step Solution
- Step 1: Write the proportion equation
1,280,829.20 : 1,921,243.80 = 394,365.20 : x - Step 2: Convert to fraction form
1,280,829.20/1,921,243.80 = 394,365.20/x - Step 3: Cross multiply
1,280,829.20x = 1,921,243.80 × 394,365.20 - Step 4: Simplify right side
1,280,829.20x = 757,671,695,435.76 - Step 5: Solve for x
x = 757,671,695,435.76/1,280,829.20 - Step 6: Final answer
x = 591,547.80
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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.