Finding the Fourth Proportional to 1,391,299.20, 1,919,557.08 and 779,369.31
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Solution
The fourth proportional to 1,391,299.20, 1,919,557.08 and 779,369.31 is: 1,075,285.52
Step by Step Solution
- Step 1: Write the proportion equation
1,391,299.20 : 1,919,557.08 = 779,369.31 : x - Step 2: Convert to fraction form
1,391,299.20/1,919,557.08 = 779,369.31/x - Step 3: Cross multiply
1,391,299.20x = 1,919,557.08 × 779,369.31 - Step 4: Simplify right side
1,391,299.20x = 1,496,043,876,945.22 - Step 5: Solve for x
x = 1,496,043,876,945.22/1,391,299.20 - Step 6: Final answer
x = 1,075,285.52
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.