Finding the Fourth Proportional to 305,444,841.96, 421,724,765.58 and 285,930,328.44
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Solution
The fourth proportional to 305,444,841.96, 421,724,765.58 and 285,930,328.44 is: 394,781,263.81
Step by Step Solution
- Step 1: Write the proportion equation
305,444,841.96 : 421,724,765.58 = 285,930,328.44 : x - Step 2: Convert to fraction form
305,444,841.96/421,724,765.58 = 285,930,328.44/x - Step 3: Cross multiply
305,444,841.96x = 421,724,765.58 × 285,930,328.44 - Step 4: Simplify right side
305,444,841.96x = 120,583,900,732,141,744 - Step 5: Solve for x
x = 120,583,900,732,141,744/305,444,841.96 - Step 6: Final answer
x = 394,781,263.81
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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.