Finding the Fourth Proportional to 318,138.39, 477,207.59 and 128,682.63
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Solution
The fourth proportional to 318,138.39, 477,207.59 and 128,682.63 is: 193,023.95
Step by Step Solution
- Step 1: Write the proportion equation
318,138.39 : 477,207.59 = 128,682.63 : x - Step 2: Convert to fraction form
318,138.39/477,207.59 = 128,682.63/x - Step 3: Cross multiply
318,138.39x = 477,207.59 × 128,682.63 - Step 4: Simplify right side
318,138.39x = 61,408,327,093.75 - Step 5: Solve for x
x = 61,408,327,093.75/318,138.39 - Step 6: Final answer
x = 193,023.95
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Similar ratio
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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.