Finding the Fourth Proportional to 280,678.26, 387,335.34 and 153,354.81
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Solution
The fourth proportional to 280,678.26, 387,335.34 and 153,354.81 is: 211,629.28
Step by Step Solution
- Step 1: Write the proportion equation
280,678.26 : 387,335.34 = 153,354.81 : x - Step 2: Convert to fraction form
280,678.26/387,335.34 = 153,354.81/x - Step 3: Cross multiply
280,678.26x = 387,335.34 × 153,354.81 - Step 4: Simplify right side
280,678.26x = 59,399,737,471.99 - Step 5: Solve for x
x = 59,399,737,471.99/280,678.26 - Step 6: Final answer
x = 211,629.28
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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.