Finding the Fourth Proportional to 420,428.57, 580,205.00 and 239,135.84
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Solution
The fourth proportional to 420,428.57, 580,205.00 and 239,135.84 is: 330,015.17
Step by Step Solution
- Step 1: Write the proportion equation
420,428.57 : 580,205.00 = 239,135.84 : x - Step 2: Convert to fraction form
420,428.57/580,205.00 = 239,135.84/x - Step 3: Cross multiply
420,428.57x = 580,205.00 × 239,135.84 - Step 4: Simplify right side
420,428.57x = 138,747,805,950.50 - Step 5: Solve for x
x = 138,747,805,950.50/420,428.57 - Step 6: Final answer
x = 330,015.17
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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.