Finding the Fourth Proportional to 612,213.80, 916,506.30 and 455,138.60
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Solution
The fourth proportional to 612,213.80, 916,506.30 and 455,138.60 is: 681,359.02
Step by Step Solution
- Step 1: Write the proportion equation
612,213.80 : 916,506.30 = 455,138.60 : x - Step 2: Convert to fraction form
612,213.80/916,506.30 = 455,138.60/x - Step 3: Cross multiply
612,213.80x = 916,506.30 × 455,138.60 - Step 4: Simplify right side
612,213.80x = 417,137,394,273.18 - Step 5: Solve for x
x = 417,137,394,273.18/612,213.80 - Step 6: Final answer
x = 681,359.02
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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.