Finding the Fourth Proportional to 230,403.36, 317,918.16 and 128,406.56
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Solution
The fourth proportional to 230,403.36, 317,918.16 and 128,406.56 is: 177,179.61
Step by Step Solution
- Step 1: Write the proportion equation
230,403.36 : 317,918.16 = 128,406.56 : x - Step 2: Convert to fraction form
230,403.36/317,918.16 = 128,406.56/x - Step 3: Cross multiply
230,403.36x = 317,918.16 × 128,406.56 - Step 4: Simplify right side
230,403.36x = 40,822,777,287.13 - Step 5: Solve for x
x = 40,822,777,287.13/230,403.36 - Step 6: Final answer
x = 177,179.61
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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.