Finding the Fourth Proportional to 812,479.13, 1,121,207.40 and 449,895.20
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Solution
The fourth proportional to 812,479.13, 1,121,207.40 and 449,895.20 is: 620,847.73
Step by Step Solution
- Step 1: Write the proportion equation
812,479.13 : 1,121,207.40 = 449,895.20 : x - Step 2: Convert to fraction form
812,479.13/1,121,207.40 = 449,895.20/x - Step 3: Cross multiply
812,479.13x = 1,121,207.40 × 449,895.20 - Step 4: Simplify right side
812,479.13x = 504,425,827,464.48 - Step 5: Solve for x
x = 504,425,827,464.48/812,479.13 - Step 6: Final answer
x = 620,847.73
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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.