Finding the Fourth Proportional to 315,974.12, 435,327.21 and 239,604.08
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Solution
The fourth proportional to 315,974.12, 435,327.21 and 239,604.08 is: 330,109.87
Step by Step Solution
- Step 1: Write the proportion equation
315,974.12 : 435,327.21 = 239,604.08 : x - Step 2: Convert to fraction form
315,974.12/435,327.21 = 239,604.08/x - Step 3: Cross multiply
315,974.12x = 435,327.21 × 239,604.08 - Step 4: Simplify right side
315,974.12x = 104,306,173,474.38 - Step 5: Solve for x
x = 104,306,173,474.38/315,974.12 - Step 6: Final answer
x = 330,109.87
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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.