Finding the Fourth Proportional to 428,431.68, 638,817.18 and 416,661.06
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Solution
The fourth proportional to 428,431.68, 638,817.18 and 416,661.06 is: 621,266.48
Step by Step Solution
- Step 1: Write the proportion equation
428,431.68 : 638,817.18 = 416,661.06 : x - Step 2: Convert to fraction form
428,431.68/638,817.18 = 416,661.06/x - Step 3: Cross multiply
428,431.68x = 638,817.18 × 416,661.06 - Step 4: Simplify right side
428,431.68x = 266,170,243,365.01 - Step 5: Solve for x
x = 266,170,243,365.01/428,431.68 - Step 6: Final answer
x = 621,266.48
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.