Finding the Fourth Proportional to 579,419.20, 869,128.80 and 486,107.20
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Solution
The fourth proportional to 579,419.20, 869,128.80 and 486,107.20 is: 729,160.80
Step by Step Solution
- Step 1: Write the proportion equation
579,419.20 : 869,128.80 = 486,107.20 : x - Step 2: Convert to fraction form
579,419.20/869,128.80 = 486,107.20/x - Step 3: Cross multiply
579,419.20x = 869,128.80 × 486,107.20 - Step 4: Simplify right side
579,419.20x = 422,489,767,407.36 - Step 5: Solve for x
x = 422,489,767,407.36/579,419.20 - Step 6: Final answer
x = 729,160.80
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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.