Finding the Fourth Proportional to 1,138,702.56, 1,571,441.28 and 629,437.68
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Solution
The fourth proportional to 1,138,702.56, 1,571,441.28 and 629,437.68 is: 868,641.55
Step by Step Solution
- Step 1: Write the proportion equation
1,138,702.56 : 1,571,441.28 = 629,437.68 : x - Step 2: Convert to fraction form
1,138,702.56/1,571,441.28 = 629,437.68/x - Step 3: Cross multiply
1,138,702.56x = 1,571,441.28 × 629,437.68 - Step 4: Simplify right side
1,138,702.56x = 989,124,353,539.43 - Step 5: Solve for x
x = 989,124,353,539.43/1,138,702.56 - Step 6: Final answer
x = 868,641.55
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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.