Finding the Fourth Proportional to 638,425.36, 881,021.21 and 351,945.44
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Solution
The fourth proportional to 638,425.36, 881,021.21 and 351,945.44 is: 485,681.51
Step by Step Solution
- Step 1: Write the proportion equation
638,425.36 : 881,021.21 = 351,945.44 : x - Step 2: Convert to fraction form
638,425.36/881,021.21 = 351,945.44/x - Step 3: Cross multiply
638,425.36x = 881,021.21 × 351,945.44 - Step 4: Simplify right side
638,425.36x = 310,071,394,541.78 - Step 5: Solve for x
x = 310,071,394,541.78/638,425.36 - Step 6: Final answer
x = 485,681.51
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1.5x scale
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.