Finding the Fourth Proportional to 3,178,489.31, 4,386,284.42 and 1,728,184.75
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Solution
The fourth proportional to 3,178,489.31, 4,386,284.42 and 1,728,184.75 is: 2,384,878.19
Step by Step Solution
- Step 1: Write the proportion equation
3,178,489.31 : 4,386,284.42 = 1,728,184.75 : x - Step 2: Convert to fraction form
3,178,489.31/4,386,284.42 = 1,728,184.75/x - Step 3: Cross multiply
3,178,489.31x = 4,386,284.42 × 1,728,184.75 - Step 4: Simplify right side
3,178,489.31x = 7,580,309,821,875.17 - Step 5: Solve for x
x = 7,580,309,821,875.17/3,178,489.31 - Step 6: Final answer
x = 2,384,878.19
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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.