Finding the Fourth Proportional to 256,988.40, 354,640.92 and 143,812.08
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Solution
The fourth proportional to 256,988.40, 354,640.92 and 143,812.08 is: 198,458.95
Step by Step Solution
- Step 1: Write the proportion equation
256,988.40 : 354,640.92 = 143,812.08 : x - Step 2: Convert to fraction form
256,988.40/354,640.92 = 143,812.08/x - Step 3: Cross multiply
256,988.40x = 354,640.92 × 143,812.08 - Step 4: Simplify right side
256,988.40x = 51,001,648,358.31 - Step 5: Solve for x
x = 51,001,648,358.31/256,988.40 - Step 6: Final answer
x = 198,458.95
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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.