Finding the Fourth Proportional to 289,448.80, 399,434.97 and 162,128.95
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Solution
The fourth proportional to 289,448.80, 399,434.97 and 162,128.95 is: 223,735.50
Step by Step Solution
- Step 1: Write the proportion equation
289,448.80 : 399,434.97 = 162,128.95 : x - Step 2: Convert to fraction form
289,448.80/399,434.97 = 162,128.95/x - Step 3: Cross multiply
289,448.80x = 399,434.97 × 162,128.95 - Step 4: Simplify right side
289,448.80x = 64,759,972,279.38 - Step 5: Solve for x
x = 64,759,972,279.38/289,448.80 - Step 6: Final answer
x = 223,735.50
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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.