Finding the Fourth Proportional to 840,715.68, 1,261,060.14 and 391,185.12
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Solution
The fourth proportional to 840,715.68, 1,261,060.14 and 391,185.12 is: 586,771.45
Step by Step Solution
- Step 1: Write the proportion equation
840,715.68 : 1,261,060.14 = 391,185.12 : x - Step 2: Convert to fraction form
840,715.68/1,261,060.14 = 391,185.12/x - Step 3: Cross multiply
840,715.68x = 1,261,060.14 × 391,185.12 - Step 4: Simplify right side
840,715.68x = 493,307,962,193.12 - Step 5: Solve for x
x = 493,307,962,193.12/840,715.68 - Step 6: Final answer
x = 586,771.45
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1.5x scale
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.