Finding the Fourth Proportional to 998.68, 1,378.26 and 579.18
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Solution
The fourth proportional to 998.68, 1,378.26 and 579.18 is: 799.32
Step by Step Solution
- Step 1: Write the proportion equation
998.68 : 1,378.26 = 579.18 : x - Step 2: Convert to fraction form
998.68/1,378.26 = 579.18/x - Step 3: Cross multiply
998.68x = 1,378.26 × 579.18 - Step 4: Simplify right side
998.68x = 798,260.63 - Step 5: Solve for x
x = 798,260.63/998.68 - Step 6: Final answer
x = 799.32
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Double scale
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.