Finding the Fourth Proportional to 765,674.96, 1,056,612.80 and 421,508.09
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Solution
The fourth proportional to 765,674.96, 1,056,612.80 and 421,508.09 is: 581,670.91
Step by Step Solution
- Step 1: Write the proportion equation
765,674.96 : 1,056,612.80 = 421,508.09 : x - Step 2: Convert to fraction form
765,674.96/1,056,612.80 = 421,508.09/x - Step 3: Cross multiply
765,674.96x = 1,056,612.80 × 421,508.09 - Step 4: Simplify right side
765,674.96x = 445,370,846,892.85 - Step 5: Solve for x
x = 445,370,846,892.85/765,674.96 - Step 6: Final answer
x = 581,670.91
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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.