Finding the Fourth Proportional to 312,637.99, 431,589.18 and 209,449.86
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Solution
The fourth proportional to 312,637.99, 431,589.18 and 209,449.86 is: 289,140.46
Step by Step Solution
- Step 1: Write the proportion equation
312,637.99 : 431,589.18 = 209,449.86 : x - Step 2: Convert to fraction form
312,637.99/431,589.18 = 209,449.86/x - Step 3: Cross multiply
312,637.99x = 431,589.18 × 209,449.86 - Step 4: Simplify right side
312,637.99x = 90,396,290,123.32 - Step 5: Solve for x
x = 90,396,290,123.32/312,637.99 - Step 6: Final answer
x = 289,140.46
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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.