Finding the Fourth Proportional to 283,242.21, 390,882.44 and 154,189.05
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Solution
The fourth proportional to 283,242.21, 390,882.44 and 154,189.05 is: 212,785.35
Step by Step Solution
- Step 1: Write the proportion equation
283,242.21 : 390,882.44 = 154,189.05 : x - Step 2: Convert to fraction form
283,242.21/390,882.44 = 154,189.05/x - Step 3: Cross multiply
283,242.21x = 390,882.44 × 154,189.05 - Step 4: Simplify right side
283,242.21x = 60,269,792,085.28 - Step 5: Solve for x
x = 60,269,792,085.28/283,242.21 - Step 6: Final answer
x = 212,785.35
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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.