Finding the Fourth Proportional to 878,991.72, 1,316,740.64 and 428,398.68
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Solution
The fourth proportional to 878,991.72, 1,316,740.64 and 428,398.68 is: 641,746.60
Step by Step Solution
- Step 1: Write the proportion equation
878,991.72 : 1,316,740.64 = 428,398.68 : x - Step 2: Convert to fraction form
878,991.72/1,316,740.64 = 428,398.68/x - Step 3: Cross multiply
878,991.72x = 1,316,740.64 × 428,398.68 - Step 4: Simplify right side
878,991.72x = 564,089,952,078.36 - Step 5: Solve for x
x = 564,089,952,078.36/878,991.72 - Step 6: Final answer
x = 641,746.60
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.