Finding the Fourth Proportional to 305,668.84, 458,355.79 and 128,128.18
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Solution
The fourth proportional to 305,668.84, 458,355.79 and 128,128.18 is: 192,130.45
Step by Step Solution
- Step 1: Write the proportion equation
305,668.84 : 458,355.79 = 128,128.18 : x - Step 2: Convert to fraction form
305,668.84/458,355.79 = 128,128.18/x - Step 3: Cross multiply
305,668.84x = 458,355.79 × 128,128.18 - Step 4: Simplify right side
305,668.84x = 58,728,293,165.16 - Step 5: Solve for x
x = 58,728,293,165.16/305,668.84 - Step 6: Final answer
x = 192,130.45
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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.