Finding the Fourth Proportional to 642,605.68, 886,780.74 and 356,119.62
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Solution
The fourth proportional to 642,605.68, 886,780.74 and 356,119.62 is: 491,436.71
Step by Step Solution
- Step 1: Write the proportion equation
642,605.68 : 886,780.74 = 356,119.62 : x - Step 2: Convert to fraction form
642,605.68/886,780.74 = 356,119.62/x - Step 3: Cross multiply
642,605.68x = 886,780.74 × 356,119.62 - Step 4: Simplify right side
642,605.68x = 315,800,020,152.12 - Step 5: Solve for x
x = 315,800,020,152.12/642,605.68 - Step 6: Final answer
x = 491,436.71
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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.