Finding the Fourth Proportional to 428,894.70, 643,134.24 and 129,319.44
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Solution
The fourth proportional to 428,894.70, 643,134.24 and 129,319.44 is: 193,916.50
Step by Step Solution
- Step 1: Write the proportion equation
428,894.70 : 643,134.24 = 129,319.44 : x - Step 2: Convert to fraction form
428,894.70/643,134.24 = 129,319.44/x - Step 3: Cross multiply
428,894.70x = 643,134.24 × 129,319.44 - Step 4: Simplify right side
428,894.70x = 83,169,759,761.63 - Step 5: Solve for x
x = 83,169,759,761.63/428,894.70 - Step 6: Final answer
x = 193,916.50
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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.