Finding the Fourth Proportional to 1,391,135.28, 1,919,838.60 and 779,252.28
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Solution
The fourth proportional to 1,391,135.28, 1,919,838.60 and 779,252.28 is: 1,075,408.43
Step by Step Solution
- Step 1: Write the proportion equation
1,391,135.28 : 1,919,838.60 = 779,252.28 : x - Step 2: Convert to fraction form
1,391,135.28/1,919,838.60 = 779,252.28/x - Step 3: Cross multiply
1,391,135.28x = 1,919,838.60 × 779,252.28 - Step 4: Simplify right side
1,391,135.28x = 1,496,038,606,282.01 - Step 5: Solve for x
x = 1,496,038,606,282.01/1,391,135.28 - Step 6: Final answer
x = 1,075,408.43
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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.