Finding the Fourth Proportional to 812,207.90, 1,118,343.38 and 721,406.09
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Solution
The fourth proportional to 812,207.90, 1,118,343.38 and 721,406.09 is: 993,316.76
Step by Step Solution
- Step 1: Write the proportion equation
812,207.90 : 1,118,343.38 = 721,406.09 : x - Step 2: Convert to fraction form
812,207.90/1,118,343.38 = 721,406.09/x - Step 3: Cross multiply
812,207.90x = 1,118,343.38 × 721,406.09 - Step 4: Simplify right side
812,207.90x = 806,779,715,844.44 - Step 5: Solve for x
x = 806,779,715,844.44/812,207.90 - Step 6: Final answer
x = 993,316.76
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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.