Finding the Fourth Proportional to 311,919.21, 430,428.47 and 177,774.57
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Solution
The fourth proportional to 311,919.21, 430,428.47 and 177,774.57 is: 245,317.48
Step by Step Solution
- Step 1: Write the proportion equation
311,919.21 : 430,428.47 = 177,774.57 : x - Step 2: Convert to fraction form
311,919.21/430,428.47 = 177,774.57/x - Step 3: Cross multiply
311,919.21x = 430,428.47 × 177,774.57 - Step 4: Simplify right side
311,919.21x = 76,519,235,281.14 - Step 5: Solve for x
x = 76,519,235,281.14/311,919.21 - Step 6: Final answer
x = 245,317.48
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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.