Finding the Fourth Proportional to 209,931.44, 289,653.68 and 128,238.88
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Solution
The fourth proportional to 209,931.44, 289,653.68 and 128,238.88 is: 176,938.07
Step by Step Solution
- Step 1: Write the proportion equation
209,931.44 : 289,653.68 = 128,238.88 : x - Step 2: Convert to fraction form
209,931.44/289,653.68 = 128,238.88/x - Step 3: Cross multiply
209,931.44x = 289,653.68 × 128,238.88 - Step 4: Simplify right side
209,931.44x = 37,144,863,511.08 - Step 5: Solve for x
x = 37,144,863,511.08/209,931.44 - Step 6: Final answer
x = 176,938.07
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1.5x scale
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.