Finding the Fourth Proportional to 430,459.11, 645,938.19 and 217,243.71
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Solution
The fourth proportional to 430,459.11, 645,938.19 and 217,243.71 is: 325,991.50
Step by Step Solution
- Step 1: Write the proportion equation
430,459.11 : 645,938.19 = 217,243.71 : x - Step 2: Convert to fraction form
430,459.11/645,938.19 = 217,243.71/x - Step 3: Cross multiply
430,459.11x = 645,938.19 × 217,243.71 - Step 4: Simplify right side
430,459.11x = 140,326,008,826.29 - Step 5: Solve for x
x = 140,326,008,826.29/430,459.11 - Step 6: Final answer
x = 325,991.50
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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.