Finding the Fourth Proportional to 715,709.19, 987,680.74 and 409,790.28
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Solution
The fourth proportional to 715,709.19, 987,680.74 and 409,790.28 is: 565,511.76
Step by Step Solution
- Step 1: Write the proportion equation
715,709.19 : 987,680.74 = 409,790.28 : x - Step 2: Convert to fraction form
715,709.19/987,680.74 = 409,790.28/x - Step 3: Cross multiply
715,709.19x = 987,680.74 × 409,790.28 - Step 4: Simplify right side
715,709.19x = 404,741,966,995.21 - Step 5: Solve for x
x = 404,741,966,995.21/715,709.19 - Step 6: Final answer
x = 565,511.76
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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.