Finding the Fourth Proportional to 305,669.84, 458,357.29 and 128,129.18
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Solution
The fourth proportional to 305,669.84, 458,357.29 and 128,129.18 is: 192,131.95
Step by Step Solution
- Step 1: Write the proportion equation
305,669.84 : 458,357.29 = 128,129.18 : x - Step 2: Convert to fraction form
305,669.84/458,357.29 = 128,129.18/x - Step 3: Cross multiply
305,669.84x = 458,357.29 × 128,129.18 - Step 4: Simplify right side
305,669.84x = 58,728,943,714.72 - Step 5: Solve for x
x = 58,728,943,714.72/305,669.84 - Step 6: Final answer
x = 192,131.95
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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.