Finding the Fourth Proportional to 409,114.08, 613,769.12 and 128,631.32
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Solution
The fourth proportional to 409,114.08, 613,769.12 and 128,631.32 is: 192,977.79
Step by Step Solution
- Step 1: Write the proportion equation
409,114.08 : 613,769.12 = 128,631.32 : x - Step 2: Convert to fraction form
409,114.08/613,769.12 = 128,631.32/x - Step 3: Cross multiply
409,114.08x = 613,769.12 × 128,631.32 - Step 4: Simplify right side
409,114.08x = 78,949,932,080.84 - Step 5: Solve for x
x = 78,949,932,080.84/409,114.08 - Step 6: Final answer
x = 192,977.79
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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.