Finding the Fourth Proportional to 272,459.92, 408,689.40 and 85,471.12
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Solution
The fourth proportional to 272,459.92, 408,689.40 and 85,471.12 is: 128,206.53
Step by Step Solution
- Step 1: Write the proportion equation
272,459.92 : 408,689.40 = 85,471.12 : x - Step 2: Convert to fraction form
272,459.92/408,689.40 = 85,471.12/x - Step 3: Cross multiply
272,459.92x = 408,689.40 × 85,471.12 - Step 4: Simplify right side
272,459.92x = 34,931,140,750.13 - Step 5: Solve for x
x = 34,931,140,750.13/272,459.92 - Step 6: Final answer
x = 128,206.53
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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.