Finding the Fourth Proportional to 405,988.80, 608,464.80 and 312,028.80
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Solution
The fourth proportional to 405,988.80, 608,464.80 and 312,028.80 is: 467,644.78
Step by Step Solution
- Step 1: Write the proportion equation
405,988.80 : 608,464.80 = 312,028.80 : x - Step 2: Convert to fraction form
405,988.80/608,464.80 = 312,028.80/x - Step 3: Cross multiply
405,988.80x = 608,464.80 × 312,028.80 - Step 4: Simplify right side
405,988.80x = 189,858,541,386.24 - Step 5: Solve for x
x = 189,858,541,386.24/405,988.80 - Step 6: Final answer
x = 467,644.78
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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.