Finding the Fourth Proportional to 287,465.38, 396,489.70 and 210,958.63
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Solution
The fourth proportional to 287,465.38, 396,489.70 and 210,958.63 is: 290,966.95
Step by Step Solution
- Step 1: Write the proportion equation
287,465.38 : 396,489.70 = 210,958.63 : x - Step 2: Convert to fraction form
287,465.38/396,489.70 = 210,958.63/x - Step 3: Cross multiply
287,465.38x = 396,489.70 × 210,958.63 - Step 4: Simplify right side
287,465.38x = 83,642,923,921.11 - Step 5: Solve for x
x = 83,642,923,921.11/287,465.38 - Step 6: Final answer
x = 290,966.95
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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.