Finding the Fourth Proportional to 1,188,214.13, 1,639,735.96 and 644,349.78
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Solution
The fourth proportional to 1,188,214.13, 1,639,735.96 and 644,349.78 is: 889,202.95
Step by Step Solution
- Step 1: Write the proportion equation
1,188,214.13 : 1,639,735.96 = 644,349.78 : x - Step 2: Convert to fraction form
1,188,214.13/1,639,735.96 = 644,349.78/x - Step 3: Cross multiply
1,188,214.13x = 1,639,735.96 × 644,349.78 - Step 4: Simplify right side
1,188,214.13x = 1,056,563,505,084.09 - Step 5: Solve for x
x = 1,056,563,505,084.09/1,188,214.13 - Step 6: Final answer
x = 889,202.95
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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.