Finding the Fourth Proportional to 390,631.70, 584,343.38 and 311,899.70
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Solution
The fourth proportional to 390,631.70, 584,343.38 and 311,899.70 is: 466,568.70
Step by Step Solution
- Step 1: Write the proportion equation
390,631.70 : 584,343.38 = 311,899.70 : x - Step 2: Convert to fraction form
390,631.70/584,343.38 = 311,899.70/x - Step 3: Cross multiply
390,631.70x = 584,343.38 × 311,899.70 - Step 4: Simplify right side
390,631.70x = 182,256,524,918.99 - Step 5: Solve for x
x = 182,256,524,918.99/390,631.70 - Step 6: Final answer
x = 466,568.70
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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.