Finding the Fourth Proportional to 258,019.80, 387,029.70 and 68,479.80
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Solution
The fourth proportional to 258,019.80, 387,029.70 and 68,479.80 is: 102,719.70
Step by Step Solution
- Step 1: Write the proportion equation
258,019.80 : 387,029.70 = 68,479.80 : x - Step 2: Convert to fraction form
258,019.80/387,029.70 = 68,479.80/x - Step 3: Cross multiply
258,019.80x = 387,029.70 × 68,479.80 - Step 4: Simplify right side
258,019.80x = 26,503,716,450.06 - Step 5: Solve for x
x = 26,503,716,450.06/258,019.80 - Step 6: Final answer
x = 102,719.70
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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.