Finding the Fourth Proportional to 287,711.80, 431,567.70 and 147,743.80
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Solution
The fourth proportional to 287,711.80, 431,567.70 and 147,743.80 is: 221,615.70
Step by Step Solution
- Step 1: Write the proportion equation
287,711.80 : 431,567.70 = 147,743.80 : x - Step 2: Convert to fraction form
287,711.80/431,567.70 = 147,743.80/x - Step 3: Cross multiply
287,711.80x = 431,567.70 × 147,743.80 - Step 4: Simplify right side
287,711.80x = 63,761,451,955.26 - Step 5: Solve for x
x = 63,761,451,955.26/287,711.80 - Step 6: Final answer
x = 221,615.70
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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.