Finding the Fourth Proportional to 317,689.36, 478,765.20 and 286,138.96
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Solution
The fourth proportional to 317,689.36, 478,765.20 and 286,138.96 is: 431,218.02
Step by Step Solution
- Step 1: Write the proportion equation
317,689.36 : 478,765.20 = 286,138.96 : x - Step 2: Convert to fraction form
317,689.36/478,765.20 = 286,138.96/x - Step 3: Cross multiply
317,689.36x = 478,765.20 × 286,138.96 - Step 4: Simplify right side
317,689.36x = 136,993,376,412.19 - Step 5: Solve for x
x = 136,993,376,412.19/317,689.36 - Step 6: Final answer
x = 431,218.02
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Why These Related Problems?
These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.