Finding the Fourth Proportional to 812,478.49, 1,121,219.62 and 449,902.35
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Solution
The fourth proportional to 812,478.49, 1,121,219.62 and 449,902.35 is: 620,864.86
Step by Step Solution
- Step 1: Write the proportion equation
812,478.49 : 1,121,219.62 = 449,902.35 : x - Step 2: Convert to fraction form
812,478.49/1,121,219.62 = 449,902.35/x - Step 3: Cross multiply
812,478.49x = 1,121,219.62 × 449,902.35 - Step 4: Simplify right side
812,478.49x = 504,439,340,779.35 - Step 5: Solve for x
x = 504,439,340,779.35/812,478.49 - Step 6: Final answer
x = 620,864.86
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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.