Finding the Fourth Proportional to 218,939.70, 328,409.55 and 140,207.70
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Solution
The fourth proportional to 218,939.70, 328,409.55 and 140,207.70 is: 210,311.55
Step by Step Solution
- Step 1: Write the proportion equation
218,939.70 : 328,409.55 = 140,207.70 : x - Step 2: Convert to fraction form
218,939.70/328,409.55 = 140,207.70/x - Step 3: Cross multiply
218,939.70x = 328,409.55 × 140,207.70 - Step 4: Simplify right side
218,939.70x = 46,045,547,663.54 - Step 5: Solve for x
x = 46,045,547,663.54/218,939.70 - Step 6: Final answer
x = 210,311.55
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.