Finding the Fourth Proportional to 307,816.80, 461,725.20 and 212,431.20
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Solution
The fourth proportional to 307,816.80, 461,725.20 and 212,431.20 is: 318,646.80
Step by Step Solution
- Step 1: Write the proportion equation
307,816.80 : 461,725.20 = 212,431.20 : x - Step 2: Convert to fraction form
307,816.80/461,725.20 = 212,431.20/x - Step 3: Cross multiply
307,816.80x = 461,725.20 × 212,431.20 - Step 4: Simplify right side
307,816.80x = 98,084,838,306.24 - Step 5: Solve for x
x = 98,084,838,306.24/307,816.80 - Step 6: Final answer
x = 318,646.80
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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.