Finding the Fourth Proportional to 428,936.07, 643,408.44 and 129,419.13
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Solution
The fourth proportional to 428,936.07, 643,408.44 and 129,419.13 is: 194,130.00
Step by Step Solution
- Step 1: Write the proportion equation
428,936.07 : 643,408.44 = 129,419.13 : x - Step 2: Convert to fraction form
428,936.07/643,408.44 = 129,419.13/x - Step 3: Cross multiply
428,936.07x = 643,408.44 × 129,419.13 - Step 4: Simplify right side
428,936.07x = 83,269,360,539.46 - Step 5: Solve for x
x = 83,269,360,539.46/428,936.07 - Step 6: Final answer
x = 194,130.00
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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.