Finding the Fourth Proportional to 278,709.06, 418,000.52 and 128,867.70
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Solution
The fourth proportional to 278,709.06, 418,000.52 and 128,867.70 is: 193,272.39
Step by Step Solution
- Step 1: Write the proportion equation
278,709.06 : 418,000.52 = 128,867.70 : x - Step 2: Convert to fraction form
278,709.06/418,000.52 = 128,867.70/x - Step 3: Cross multiply
278,709.06x = 418,000.52 × 128,867.70 - Step 4: Simplify right side
278,709.06x = 53,866,765,611.20 - Step 5: Solve for x
x = 53,866,765,611.20/278,709.06 - Step 6: Final answer
x = 193,272.39
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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.