Finding the Fourth Proportional to 679,489.97, 1,019,431.78 and 279,925.07
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Solution
The fourth proportional to 679,489.97, 1,019,431.78 and 279,925.07 is: 419,968.68
Step by Step Solution
- Step 1: Write the proportion equation
679,489.97 : 1,019,431.78 = 279,925.07 : x - Step 2: Convert to fraction form
679,489.97/1,019,431.78 = 279,925.07/x - Step 3: Cross multiply
679,489.97x = 1,019,431.78 × 279,925.07 - Step 4: Simplify right side
679,489.97x = 285,364,506,579.75 - Step 5: Solve for x
x = 285,364,506,579.75/679,489.97 - Step 6: Final answer
x = 419,968.68
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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.