Finding the Fourth Proportional to 309,987.74, 427,984.79 and 189,199.05
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Solution
The fourth proportional to 309,987.74, 427,984.79 and 189,199.05 is: 261,217.80
Step by Step Solution
- Step 1: Write the proportion equation
309,987.74 : 427,984.79 = 189,199.05 : x - Step 2: Convert to fraction form
309,987.74/427,984.79 = 189,199.05/x - Step 3: Cross multiply
309,987.74x = 427,984.79 × 189,199.05 - Step 4: Simplify right side
309,987.74x = 80,974,314,736.45 - Step 5: Solve for x
x = 80,974,314,736.45/309,987.74 - Step 6: Final answer
x = 261,217.80
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.