Finding the Fourth Proportional to 812,387.12, 1,121,157.35 and 449,844.71
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Solution
The fourth proportional to 812,387.12, 1,121,157.35 and 449,844.71 is: 620,820.65
Step by Step Solution
- Step 1: Write the proportion equation
812,387.12 : 1,121,157.35 = 449,844.71 : x - Step 2: Convert to fraction form
812,387.12/1,121,157.35 = 449,844.71/x - Step 3: Cross multiply
812,387.12x = 1,121,157.35 × 449,844.71 - Step 4: Simplify right side
812,387.12x = 504,346,705,215.71 - Step 5: Solve for x
x = 504,346,705,215.71/812,387.12 - Step 6: Final answer
x = 620,820.65
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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.