Finding the Fourth Proportional to 812,208.90, 1,118,344.75 and 721,407.09
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Solution
The fourth proportional to 812,208.90, 1,118,344.75 and 721,407.09 is: 993,318.14
Step by Step Solution
- Step 1: Write the proportion equation
812,208.90 : 1,118,344.75 = 721,407.09 : x - Step 2: Convert to fraction form
812,208.90/1,118,344.75 = 721,407.09/x - Step 3: Cross multiply
812,208.90x = 1,118,344.75 × 721,407.09 - Step 4: Simplify right side
812,208.90x = 806,781,831,714.28 - Step 5: Solve for x
x = 806,781,831,714.28/812,208.90 - Step 6: Final answer
x = 993,318.14
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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.