Finding the Fourth Proportional to 1,287,468.42, 1,931,202.62 and 686,609.20
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Solution
The fourth proportional to 1,287,468.42, 1,931,202.62 and 686,609.20 is: 1,029,913.79
Step by Step Solution
- Step 1: Write the proportion equation
1,287,468.42 : 1,931,202.62 = 686,609.20 : x - Step 2: Convert to fraction form
1,287,468.42/1,931,202.62 = 686,609.20/x - Step 3: Cross multiply
1,287,468.42x = 1,931,202.62 × 686,609.20 - Step 4: Simplify right side
1,287,468.42x = 1,325,981,485,956.10 - Step 5: Solve for x
x = 1,325,981,485,956.10/1,287,468.42 - Step 6: Final answer
x = 1,029,913.79
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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.