Finding the Fourth Proportional to 878,638.20, 1,318,314.42 and 317,717.88
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Solution
The fourth proportional to 878,638.20, 1,318,314.42 and 317,717.88 is: 476,705.96
Step by Step Solution
- Step 1: Write the proportion equation
878,638.20 : 1,318,314.42 = 317,717.88 : x - Step 2: Convert to fraction form
878,638.20/1,318,314.42 = 317,717.88/x - Step 3: Cross multiply
878,638.20x = 1,318,314.42 × 317,717.88 - Step 4: Simplify right side
878,638.20x = 418,852,062,695.83 - Step 5: Solve for x
x = 418,852,062,695.83/878,638.20 - Step 6: Final answer
x = 476,705.96
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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.