Finding the Fourth Proportional to 420,207.80, 629,145.30 and 408,543.80
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Solution
The fourth proportional to 420,207.80, 629,145.30 and 408,543.80 is: 611,681.68
Step by Step Solution
- Step 1: Write the proportion equation
420,207.80 : 629,145.30 = 408,543.80 : x - Step 2: Convert to fraction form
420,207.80/629,145.30 = 408,543.80/x - Step 3: Cross multiply
420,207.80x = 629,145.30 × 408,543.80 - Step 4: Simplify right side
420,207.80x = 257,033,411,614.14 - Step 5: Solve for x
x = 257,033,411,614.14/420,207.80 - Step 6: Final answer
x = 611,681.68
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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.