Finding the Fourth Proportional to 991,425.18, 1,368,163.39 and 561,787.21
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Solution
The fourth proportional to 991,425.18, 1,368,163.39 and 561,787.21 is: 775,264.45
Step by Step Solution
- Step 1: Write the proportion equation
991,425.18 : 1,368,163.39 = 561,787.21 : x - Step 2: Convert to fraction form
991,425.18/1,368,163.39 = 561,787.21/x - Step 3: Cross multiply
991,425.18x = 1,368,163.39 × 561,787.21 - Step 4: Simplify right side
991,425.18x = 768,616,693,692.24 - Step 5: Solve for x
x = 768,616,693,692.24/991,425.18 - Step 6: Final answer
x = 775,264.45
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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.