Finding the Fourth Proportional to 283,240.21, 390,879.68 and 154,187.05
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Solution
The fourth proportional to 283,240.21, 390,879.68 and 154,187.05 is: 212,782.59
Step by Step Solution
- Step 1: Write the proportion equation
283,240.21 : 390,879.68 = 154,187.05 : x - Step 2: Convert to fraction form
283,240.21/390,879.68 = 154,187.05/x - Step 3: Cross multiply
283,240.21x = 390,879.68 × 154,187.05 - Step 4: Simplify right side
283,240.21x = 60,268,584,764.14 - Step 5: Solve for x
x = 60,268,584,764.14/283,240.21 - Step 6: Final answer
x = 212,782.59
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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.