Finding the Fourth Proportional to 643,405.11, 965,114.16 and 194,129.70
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Solution
The fourth proportional to 643,405.11, 965,114.16 and 194,129.70 is: 291,196.51
Step by Step Solution
- Step 1: Write the proportion equation
643,405.11 : 965,114.16 = 194,129.70 : x - Step 2: Convert to fraction form
643,405.11/965,114.16 = 194,129.70/x - Step 3: Cross multiply
643,405.11x = 965,114.16 × 194,129.70 - Step 4: Simplify right side
643,405.11x = 187,357,322,346.55 - Step 5: Solve for x
x = 187,357,322,346.55/643,405.11 - Step 6: Final answer
x = 291,196.51
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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.