Finding the Fourth Proportional to 255,431.88, 382,631.45 and 128,895.71
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Solution
The fourth proportional to 255,431.88, 382,631.45 and 128,895.71 is: 193,082.99
Step by Step Solution
- Step 1: Write the proportion equation
255,431.88 : 382,631.45 = 128,895.71 : x - Step 2: Convert to fraction form
255,431.88/382,631.45 = 128,895.71/x - Step 3: Cross multiply
255,431.88x = 382,631.45 × 128,895.71 - Step 4: Simplify right side
255,431.88x = 49,319,549,858.44 - Step 5: Solve for x
x = 49,319,549,858.44/255,431.88 - Step 6: Final answer
x = 193,082.99
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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.