Finding the Fourth Proportional to 389,596.20, 584,394.30 and 212,011.80
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Solution
The fourth proportional to 389,596.20, 584,394.30 and 212,011.80 is: 318,017.70
Step by Step Solution
- Step 1: Write the proportion equation
389,596.20 : 584,394.30 = 212,011.80 : x - Step 2: Convert to fraction form
389,596.20/584,394.30 = 212,011.80/x - Step 3: Cross multiply
389,596.20x = 584,394.30 × 212,011.80 - Step 4: Simplify right side
389,596.20x = 123,898,487,452.74 - Step 5: Solve for x
x = 123,898,487,452.74/389,596.20 - Step 6: Final answer
x = 318,017.70
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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.