Finding the Fourth Proportional to 389,985.19, 538,183.17 and 228,842.98
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Solution
The fourth proportional to 389,985.19, 538,183.17 and 228,842.98 is: 315,805.43
Step by Step Solution
- Step 1: Write the proportion equation
389,985.19 : 538,183.17 = 228,842.98 : x - Step 2: Convert to fraction form
389,985.19/538,183.17 = 228,842.98/x - Step 3: Cross multiply
389,985.19x = 538,183.17 × 228,842.98 - Step 4: Simplify right side
389,985.19x = 123,159,440,408.65 - Step 5: Solve for x
x = 123,159,440,408.65/389,985.19 - Step 6: Final answer
x = 315,805.43
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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.