Finding the Fourth Proportional to 420,437.46, 580,189.05 and 239,135.70
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Solution
The fourth proportional to 420,437.46, 580,189.05 and 239,135.70 is: 329,998.94
Step by Step Solution
- Step 1: Write the proportion equation
420,437.46 : 580,189.05 = 239,135.70 : x - Step 2: Convert to fraction form
420,437.46/580,189.05 = 239,135.70/x - Step 3: Cross multiply
420,437.46x = 580,189.05 × 239,135.70 - Step 4: Simplify right side
420,437.46x = 138,743,914,604.09 - Step 5: Solve for x
x = 138,743,914,604.09/420,437.46 - Step 6: Final answer
x = 329,998.94
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1.5x scale
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.