Finding the Fourth Proportional to 280,405.09, 386,948.10 and 153,081.73
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Solution
The fourth proportional to 280,405.09, 386,948.10 and 153,081.73 is: 211,246.82
Step by Step Solution
- Step 1: Write the proportion equation
280,405.09 : 386,948.10 = 153,081.73 : x - Step 2: Convert to fraction form
280,405.09/386,948.10 = 153,081.73/x - Step 3: Cross multiply
280,405.09x = 386,948.10 × 153,081.73 - Step 4: Simplify right side
280,405.09x = 59,234,684,568.21 - Step 5: Solve for x
x = 59,234,684,568.21/280,405.09 - Step 6: Final answer
x = 211,246.82
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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.