Finding the Fourth Proportional to 399,412.19, 551,193.21 and 218,129.45
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Solution
The fourth proportional to 399,412.19, 551,193.21 and 218,129.45 is: 301,021.03
Step by Step Solution
- Step 1: Write the proportion equation
399,412.19 : 551,193.21 = 218,129.45 : x - Step 2: Convert to fraction form
399,412.19/551,193.21 = 218,129.45/x - Step 3: Cross multiply
399,412.19x = 551,193.21 × 218,129.45 - Step 4: Simplify right side
399,412.19x = 120,231,470,650.39 - Step 5: Solve for x
x = 120,231,470,650.39/399,412.19 - Step 6: Final answer
x = 301,021.03
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.