Finding the Fourth Proportional to 305,669.36, 458,356.56 and 128,128.68
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Solution
The fourth proportional to 305,669.36, 458,356.56 and 128,128.68 is: 192,131.20
Step by Step Solution
- Step 1: Write the proportion equation
305,669.36 : 458,356.56 = 128,128.68 : x - Step 2: Convert to fraction form
305,669.36/458,356.56 = 128,128.68/x - Step 3: Cross multiply
305,669.36x = 458,356.56 × 128,128.68 - Step 4: Simplify right side
305,669.36x = 58,728,621,002.14 - Step 5: Solve for x
x = 58,728,621,002.14/305,669.36 - Step 6: Final answer
x = 192,131.20
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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.