Finding the Fourth Proportional to 878,903.20, 1,319,229.60 and 430,130.80
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Solution
The fourth proportional to 878,903.20, 1,319,229.60 and 430,130.80 is: 645,624.32
Step by Step Solution
- Step 1: Write the proportion equation
878,903.20 : 1,319,229.60 = 430,130.80 : x - Step 2: Convert to fraction form
878,903.20/1,319,229.60 = 430,130.80/x - Step 3: Cross multiply
878,903.20x = 1,319,229.60 × 430,130.80 - Step 4: Simplify right side
878,903.20x = 567,441,283,231.68 - Step 5: Solve for x
x = 567,441,283,231.68/878,903.20 - Step 6: Final answer
x = 645,624.32
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1.5x scale
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.